Copper Ores

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(C) Vin Callcut 2002-2014.  Small extracts can be used with acknowledgements to 'Oldcopper.org' website. 

Helpful comments are very welcome.

Cu-ores2

 

Collectable Copper Ores and Minerals

 
 

 

This is a selection of the most commonly collected copper ores.  Also included are a few other interesting ores of metals often alloyed with copper such as zinc, lead and bismuth. 

Illustrations are being added where available.

The descriptions are mostly those of the vendors and give some of the fascinating background to the collection.  They cannot always be verified.  There are variations in terminology, spellings and formulae that may be regional or accidental.  Most spellings are English (UK).  The chemical descriptions and formulae given at the end of a paragraph apply to the primary subject. 

These illustrations are of collectable samples.  Ores found in large quantities that are commercially useful are nowhere near so attractive to look at! 

For more information and illustrations, reference should be made to some of the many excellent sites run by geological specialists.

http://www.galleries.com/minerals/byname.htm

http://www.mindat.org/index.php

and 'eBay' listings.

 

 
     

 

 Chemical symbols used:

 

 

 

 

 

 

Al

Aluminium

Mn

Manganese

As

Arsenic

N

Nitrogen

Au

Gold

Na

Sodium

C

Carbon

O

Oxygen

Ca

Calcium

P

Phosphorus

Cd

Cadmium

Pb

Lead

Cl

Chlorine

S

Sulphur

Co

Cobalt

Sb

Antimony

Cu

Copper

Si

Silicon

H

Hydrogen

Sn

Tin

Fe

Iron

Te

Tellurium

K

Potassium

Zn

Zinc

 

 

 

 

 2092

 Native copper

 

 

 

2634

Adamite (Zinc Arsenate Hydroxide) from Ojuela Mine, Mapimi, Durango, Colorado.  A 20mm long large double-terminated adamite crystal is growing with a classic "fan" of adamite crystals. There are some unidentified crystals on the back, possibly an odd form of campylite, uncommon at Ojuela Mine.  Adamite is Zinc Arsenate Hydroxide Zn2AsO4(OH).  Size 75 x 68 x 25mm.

2635

Adamite from Ojuela Mine, Mapimi, Durango, Mexico. A couple of exceptionally long (for their width) lustrous slender adamite crystals that really stand out against the dark limonitic matrix. Size 40 x 30 x 30mm.  (Zinc Arsenate Hydroxide Zn2AsO4(OH).)

2758

Ajoite  from Shattuck Mine, Bisbee, Arizona. Ajoite is found in 1-2 mm thick veins cutting rock. The bluish-green areas in the photo are open sides of veins. Some rich areas of dark blue Shattuckite balls & masses. Minor minute micro greenish-brown Fornacite crystals. Matrix is Chrysocolla, Hematite, Quartz, & a black lustrous (not black Chrysocolla) mineral.  Size 100 x 80 x 67 mm. Weight 458g (1lb) (Hydrated Potassium Sodium Copper Aluminium Silicate Hydroxide (K,Na)Cu7AlSi9O24(OH)6.3H2O ) 

 

2701

Ankerite from  Port Quin (OS Ref: SW 971 806)  St Endellion  North Cornish coast. (Calcium Iron Magnesium Manganese Carbonate, Ca(Fe, Mg, Mn)(CO3)2  ) 

 

ANTLERITE (Copper Sulphate Hydroxide) Cu3(SO4)(OH)4

 

2689

Apatite as Carbonate Fluor Apatite from Gunnislake Clitters, Cornwall.  46 x 38 x 28mm, Weight 51g.  (Calcium Phosphate complex,  Ca5(PO4)3(OH,F,Cl),)   

2510

Arthurite (Hydrated Copper Iron Arsenate Phosphate Sulphate Hydroxide), a rare copper iron arsenate in the form of a thin apple green coating on Elvan.   It is typically green and forms small acicular crystals. Size approx 50 x 25 x13mm.  (Copper Chloride Hydroxide, Cu2Cl(OH)3)

2573

Atacamite crystals from the Mount Gunson Mine, S. Australia. The specimen consists of very many small green crystals of hydrated copper chloride.  Size 26 x 25mm. (Copper Chloride Hydroxide, Cu2Cl(OH)3)

2609

Atacamite with included Selenite, a high quality aesthetic specimen of clear gemmy terminated and double terminated selenite crystals on a base of drusy blue chrysocolla and dark green atacamite crystals from the Lily Mine, Pisco Province, Ica Dept. Peru. The selenites are gemmy clear crystals from 2 to 13mm long with good terminations – they are green from atacamite that is included within the crystals. Size 40 x 25mm.  (Copper Chloride Hydroxide, Cu2Cl(OH)3)

2605

Aurichalcite from the 79 Mine, Gila Co, Arizona, this specimen features needles of bright blue aurichalcite on all faces except the bottom. The needles range up to 3mm, and the overall dimensions are 25 x 22mm.  (Zinc Copper Carbonate Hydroxide (Zn,Cu)5(CO3)2(OH)6 )

9389 Aurichalite, also from USA, showing prominent needles.

2565

Azurite, and malachite crystals on a matrix.  (Hydrated Copper Carbonate), Cu3(CO3)2(OH)2

2686

Azurite  from Ting Tang mine Gwennapp, Cornwall.  (Hydrated Copper Carbonate), Cu3(CO3)2(OH)2

2594

Azurite, Malachite and Cuprite, probably from Arizona.  It could be cut to some bright Cabochons (Cabs). Picture taken wet. Size 80 x 60 x 6mm.  (Hydrated Copper Carbonate, Cu3(CO3)2(OH)2)

2593

Azurite, Malachite and Cuprite in a copper mineral nodule that has been clipped on both ends to reveal the structure. It is very solid with no fractures showing. Picture taken wet. Size 110 x 80 x 67, weighs 1,500g, 2 lb 3 oz.  (Hydrated Copper Carbonate, Cu3(CO3)2(OH)2)

2670

Azurite/Malachite.  Azurite is well known for its unparalleled colour, a deep blue called "azure".  (Hydrated Copper Carbonate, Cu3(CO3)2(OH)2)

2649

Azurite & Malachite in Conglomerate from New Mexico. Weight 730g (1lb 10oz).  (Hydrated Copper Carbonate, Cu3(CO3)2(OH)2).

 

2779

Barite, pink / white crystalline Barite, from Devon. Size approx 50 x 25 x 3mm.  (Barium Sulphate, BaSO4

 

Balyakinite, first discovered in Russia in 1980.  (Copper Tellurium Oxide, Cu,TeO3),

 

2702

Bayldonite from Penberthy Croft Mine, Cornwall.  (Hydrated Copper Lead Arsenate Hydroxide Cu3Pb(AsO4)2 - H2O).    

 

Beaverite, a rare lemon yellow secondary mineral found near San Francisco in the oxidized zone over lead-bearing deposits.  (Pb(Cu,Fe,Al)3(SO4))2(OH)6 .     

 

2687

Binheimite from Trevinnick Mine (a complex lead-antimony hydroxide, Pb2Sb2O6(O,OH) ).

2835

Boleite, Rich Blue Cube, Ag Cu Pb Chloride, Specimens with natural matrix are extremely rare because the crystals are usually in a clay-like material that falls apart when dry. This is a tiny crystal, 2 mm. on a side from Amelia Mine, Santa Rosalia, Baja California (Hydrated Lead Copper Silver Chloride Hydroxide (Pb26Cu24Ag10Cl62(OH)48.3H2O.) 

2618

Boulangerite from Wheal Emily, Wembury, Devon.  Size 40mm. (Lead Antimony Sulphide,  Pb5Sb4S11)

2688

Brochantite, with Copper, Cuprite & Langite from Wheal Garland, Cornwall. (Copper Sulphate Hydroxide, Cu4SO4(OH)6

2631

Brochantite from Blanchard Claims, Bingham, New Mexico. Tight tufts of brochantite crystals are scattered across the display surface. This specimen has a lot more brochantite on it than normal. Size  50 x 30 x 15mm (2 x 1.5 x .6 inches). (Copper Sulphate Hydroxide Cu4SO4(OH)6 ).

 

Buttgenbachite (Hydrated Copper Nitrate Chloride Hydroxide  Cu19(NO3)2Cl4(OH)32.2H2O. )

 

 

2703

Calcite, Nail Head,  from Greystones Quarry (OS Ref: SX 362 794)  Lezant, near Launceston. Cornwall.  Size 53 x 31mm (2 x 1 1/4"), weight 43g.  (Calcium Carbonate, Ca CO3,) 

 

Caledonite with Linarite from the 'Blue Bell' Mine in San Bernadino Co., California.  The name comes from that of Scotland where it was first discovered.  (Photo courtesy Dawn Rennison) (Copper Lead Carbonate Sulphate Hydroxide), Cu2Pb5CO3(SO 4)3(OH)6.

 

6094

Campylite, Drygill, Cumberland, England. museum quality campylite from this classic locality. Lustrous, shining crystals richly intergrown on quartz and barite matrix. Crystals are up to 5mm, specimen is 3.5 x 3 inches.  Campylite, a variety of Mimetite, (Lead Chloroarsenate  Pb5(AsO4)3Cl )  

 

2570

Carrolite crystal from the Democratic Republic of Congo . This is an excellent and highly lustrous crystal of the rare cobalt mineral Carrolite  from the Kambove Mine, near Likasi, Congo. The specimen is 32 by 24 mm in size, with the crystal located in the centre surrounded by some pink Cobaltocalcite. Size 34 x 24mm  Weight 13g.  (Copper-cobalt-nickel sulphide, Cu (Co,Ni)2S4 )

2623

Alluvial Cassiterite pebble  from a Cornish beach. The Cassiterite makes up approx 50% of the pebble and is in the form of a light brown fine-grained type. The remainder of the pebble is grey Killas and vein milky quartz. Size approx 75 x 50 x 40mm.  Weight 243g.  (Tin oxide, SnO2)

2638

Cassiterite as a dark brown vein specimen from Cornwall's last Tin mine, now closed, South Crofty Mine, Pool, Redruth, Cornwall. (No 5 Draw Point, 17/8/97) Size 50 x 25 x 25mm (2 x 1 x 1 inches).  Weight 151g.  (Tin oxide, SnO2)

2557

Cassiterite as a heavy fine grained light brown vein in the middle of a milky white quartz matrix. Specimen is from a long abandoned old Cornish Tin Mine. Specimen measures approx 75 x 75 x 25mm (3 x 3 x 1").  Weight 236g.  (Tin oxide, SnO2)

2669

Chalcanthite these are actually artificially grown copper sulphate crystals up to 13mm long on a 42mm limestone matrix.  Weight 18g. (Hydrated Copper Sulphate, CuSO4.5H20)

2804

Cerussite, it shows the sheen like crystal formation. Size 47 x 26mm, weight 116g.  (White Lead Ore, PbCO3 )

2759

Chalcoalumite from Lavender Pit, Bisbee, Arizona, the best locality for the mineral. Rich blue to green crusts of minute sparkling micro crystals, some with a thin iron oxide stain, covering most of the top of rock.  Also present are a few Cuprite crystals.  (Hydrated copper aluminium sulphate, CuAl4[(OH)12SO4].3H2O )

6108

Chalcocite, large showy piece from the Junction Shaft at Bisbee.  Dimensions: 3.5" x 2.0" x 1.5"  weight: 7.1 ounces (200 grams)  colour: glittery, rich  (Copper Sulphide, Cu2S )

2690

Chalcophyllite crystals on matrix from Wheal Gorland.  Size 44 x 42 x 40mm.  Weight 18g.  (Hydrated copper aluminium sulphate arsenate hydroxide,  Cu18Al2(AsO4)3(SO4)3(OH)27.33H2O )

2704

Chalcopyrite and Sphalerite (Zinc Iron Sulphide or Blende, (Zn, Fe)S, from Wheal Garland (OS Ref SW 730 427) St Day, Gwennap. Cornwall.  Size 34 x 30 x 22mm.  Weight 25g.  (Copper Iron Sulphide, CuFeS2).

2641

Chalcopyrite Crystals from a Cornish quarry.  Size 110 x 70 x 70mm (4 1/2 x 2 1/2 x 3").  Weight 365g (13oz).  (Copper Iron Sulphide, CuFeS2)

2672

Chalcopyrite crystals 2-4mm long across quartz.  Size 110 x 70 x 70.  Weight 570g (1lb 4oz).  (Copper Iron Sulphide, CuFeS2).

2586

Chalcopyrite with sphalerite, quartz and pyrite from the Huaron mine, San Jose de Huayllay District, Pasco Department, Peru. The specimen was very hard to photograph and is much better in person. Size 55 x 35 mm. Weight 75g.  (Copper Iron Sulphide, CuFeS2).

2568

Chalcopyrite, (Copper iron sulphide, Copper pyrite, CuFeS2)  iridescent purplish and bluish crystals from the Viburnum Trend, Missouri.  Size  34 x 27 mm.  Weight 23g.  (Copper Iron Sulphide, CuFeS2).

2558

Chalcosiderite as small dark apple green micro crystals on a rich brown liminitic gossan.  Size  100 x 25 x 25mm (4 x 1 x 1").  Weight 91g (3oz).  (Hydrated Copper Iron Phosphate Hydroxide CuFe6(PO4)4(OH)8.4H2O).

2792

Chalcosiderite (Hydrated Copper Iron Phosphate Hydroxide CuFe6(PO4)4(OH)8.4H2O) from Phoenix United Mine, Liskeard, Cornwall showing rare apple green micro crystals of Chalcosiderite scattered over a rich Iron Goethite / Limonite matrix. Size 90 x 50 x 50mm (3.5 x 2 x 2 inches).  Weight 218g (8oz).  (Hydrated Copper Iron Phosphate Hydroxide CuFe6(PO4)4(OH)8.4H2O).

 

2511

Chalcosiderite, a rare specimen from Stones Lode, Phoenix United Mine, Minions, Cornwall.  The Chalcosiderite crystals are of a deep apple green colour on a very heavy quartz/iron gossan. Size 50 x 50 x 50mm.  Weight 150g (5oz). (Hydrated Copper Iron Phosphate Hydroxide CuFe6(PO4)4(OH)8.4H2O).

 

2691

Chenevixite from Wheal Gorland (OS Ref:  SW 730 427) St Day, Gwennap. Cornwall. It is a complex mineral and Wheal Gorland is the classic source.  Size 26 x 20 15mm.  Weight 5g. (Copper iron arsenate, Cu2Fe2(AsO4)2(OH)4.H2O)

2613

Chrysocolla Stalactite  -  Arizona A nice specimen that features white chalcedony coating deep blue/green chrysocolla stalactites. The locale is the Ballpark Bench, Ray Mine, Pinal Co, Arizona. The specimen is very aesthetic, and has deep blue chrysocolla stalactites from 3 to 22mm tall (1/8” to 7/8”). Size overall 25 x 17 (1” x 5/8”).  Weight approx 5g.  (Hydrated copper silicate CuSiO3.H2O)

2666

Chrysocolla. This piece displays a very light blue/green Chrysocolla of botryoidal habit covering a layer of concentric Malachite from Democratic Republic of Congo.    Size 75 x 55 x 20mm,  weight  71g.  (Hydrated copper silicate CuSiO3.H2O)

 

2434

Chrysocolla/ azurite and azurite layering, smithsonite on and in, limonite, cuprite with some chalcocite. It is of botryoidal form, shaped like a cluster of grapes.  Size 95 x 60 x 50 (3 3/4" x 2 1/2" x 2"). Weight 220g (8oz).. (Hydrated copper silicate CuSiO3.H2O).

2677

Chrysocolla, showing blue and green with fluorescent green opal. This is hydrated copper silicate.  It is 130 x 50 x 60mm. Weight 466g (1lb). (Hydrated copper silicate CuSiO3.H2O).

2433

Chrysocolla/quartz/malachite/turquoise, red heamatite and a little chalcocite veins. This is from a private mine in Central Pinal Co, AZ. Occurrence is secondary copper enrichment of copper vein. . Size 70 x 55 x 25mm (2 3/4" x 2 1/4" x 1", weight  112g, 2oz…(Hydrated copper silicate CuSiO3.H2O)

 

2760

Cinnabar mercury ore from Shizhuan Prov., China Terminated 10 mm crystal on micro Quartz & Dolomite crystals. 24 x 23 x 23 mm. (Mercury Sulphide HgS )

6109

 

Clinoclase, Rare Copper Mineral  thumbnail specimen of deep blue xls of the copper arsenate mineral from the Tin Stope at Majuba Hill, Pershing County, Nevada.  (Copper Arsenate Hydroxide.  Cu3AsO4(OH)3 )

6105

CLINOCLASE  (Copper Arsenate Hydroxide).  It is comprised of numerous small crystals and crystal aggregates which are a beautiful azure blue and blue-green color set against a backdrop of mixed secondary Copper minerals.  One side has the largest patch of Clinoclase, while the other side has more evenly distributed Clinoclase with other gorgeous bright green and Turquoise blue Copper minerals.  This lovely specimen is 2.25 inches by 1.4 inches by 1.1 inches.  It weighs 38 grams.

2569

Conichcalcite, showing a green  bytroidal shape, coming from the famous Ojuela Mine, Mapimi, Mexico.  Size 37 x 27mm.  (Copper Calcium Arsenate, CaCu(AsO4)(OH))  

2603

Conichcalcite from Gold Hill, Utah. (Copper Calcium Arsenate, CaCu(AsO4)(OH)). 

2514

Connellite. Rich blue velvety blue Connellite balls with green bladed Brochantite from: Relistian Mine, Wall, Nr Gwithian, Cornwall.. This is a very nice specimen that can easily be seen with a loupe.   Size: 45 x 25 x 15mm. (Hydrated Copper Sulphate Chloride Hydroxide Cu19SO4Cl4(OH)32.3H2O).

2825

Chrysotile, ( Magnesium Iron Silicate Hydroxide (Mg,Fe)3Si2O5(OH)4 )  Beautiful Pale Silky Fibres, Ariz, asbestos ore with long (harmless) fibres.  This is classic chrysotile asbestos but fibres are too long to pose any health threat as long as the specimen is not excessively fondled! Glistening veinlet without  matrix, fibre length about 1 cm. Thumbnail specimen, about 1.1 inch across. Collected in the Salt River Canyon, Gila Co., Arizona.

2617

Cornetite Rosettes on Matrix From the Etoile Mine, Katanga Prov., Zaire comes this nice specimen that features rosettes of the rare mineral cornetite on a base of shaley malachite stained limestone. The rosettes are 2-6mm across, and coat the entire top of the are on all faces of the specimen. The crystals have a beautiful deep blue colour, and are terminated.  Size 150 x 120mm.  (Copper Phosphate Hydroxide Cu3PO4(OH)3 )  .

2571

Cornetite from the Musonoi Mine, near Kolwezi, Democratic Republic of Congo, a good specimen of the relatively rare coppermineral . It is of a blue colour over some green Chrysocolla.  Size 39 x 27mm. (Copper Phosphate Hydroxide Cu3PO4(OH)3 ) .

2824

Conichalcite,  Tiny Green Spherules on a sparkling grass green colour from Ojuela Mine, Mapimi, Durango, Mexico.  (Calcium Copper Arsenate Hydroxide)  CaCu(AsO4)(OH) )

2604

Cornwallite, from California as emerald green small botryoidal crystals.  (Also known as cornubite, Cu5(AsO4)2(OH)4

6099

 Covellite, Leonard Mine, Butte.  Ex Prof. Paul Patchick collection - with old label. Dealer price tag of $22 dated 1966. Covellite, Leonard Mine, Butte, Montana. 2.75 x 1.5 inches. Solid irridescent mass of bladed crystals. Rare and attractive locality specimen.  Outbid. Covellite (Copper Sulphide,  CuS)

6110

  Cubanite, striated metallic cubanite from Quebec, Canada. Size 17 x10mm.  (Copper Iron Sulphide  CuFe2S3 )

 

Cumengite (also spelled cumengeite)    (Lead Copper Chloride Hydroxide,  Pb21Cu20Cl42(OH)40).

 

2717

Cuprite and Malachite from Leicestershire  60g, 2oz.  (Copper Oxide, CuO2 )

 

2526

Cuprite crystals from the Irish Mag Mine, Bisbee, Arizona.  Several modified cubes of Cuprite are disseminated over the top of this 1.9"x1.0"x0.6" specimen.  It was collected in 1907 and is from the R.N.Marble collection.  (Copper Oxide, CuO2 ).

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2685

Cuprite from County Bridge Quarry SW 722 219 Lizard Peninsula. Cornwall. (Copper Oxide, CuO2 ). 

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2700

Cuprite from Wheal Gorland (OS Ref:  SW 730 427) St Day, Gwennap. Cornwall. Cuprite, Copper Oxide, Cu2O, gives the greatest yield of copper per molecule since there is only one oxygen atom to every two copper atoms. (Copper Oxide, CuO2 ) .

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2455

Cuprite from Phoenix United Mine, Liskeard, Cornwall, showing red with some green Malachite and Chrysocolla in a granitic matrix. Size 50 x 50 x 50mm.

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2362

Large nugget of Cuprite and turquoise found in the Hassayampa River near Amazon Gorge, Arizona.  It is water worn, feels very heavy and might be ideal for conversion to semi-precious stones.    Size 125 x 60 x 50mm, weight 18.65oz, equivalent to 2,797 carats. (Copper Oxide, CuO2 ).  

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2811

Cuproadamite   This piece comes from Agios Constantinos, Laurion, Greece - one of the oldest mines on the planet. Size is 22 by 13 by 27 mm. The backside is covered with crystals as well.  Cuproadamite, is frequently regarded as a variety of the closely related mineral, Adamite. It is the presence of Copper in the crystal lattice which differentiates it apart and gives rise to the emerald green colour. Cuproadamite does not fluoresce at all, whilst Adamite is one of the strongest fluorescing minerals around. (Copper Zinc Arsenate Hydroxide (Cu,Zn)2(AsO4)(OH))

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2816

Cuproadamite from Laurion, Greece Cuproadamite is unusual - this piece comes from Agios Constantinos, Laurion, Greece - one of the oldest mines on the planet. Size is 22 by 13 by 27 mm. The backside is covered with crystals as well. (Copper Zinc Arsenate Hydroxide (Cu,Zn)2(AsO4)(OH) )

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6096

 

Electric green- Cuprosklodowskite from Congo.  From the Musonoi Mine in the Shaba province of the Congo. It measures    1 1/2 x 1 1/4 x 1 inches. It consists of a breccia matrix with cupro on a couple of surfaces. The cupro is in lustrous chatoyant needle-like crystals.   Cuprosklodowskite  mainly found only at Shaba, Zaire,  (Hydrated Copper Uranyl Silicate Cu(UO2)2Si2O7.6H2O ).

 

2822

Cylindrite: Extremely Rare Round Crystals  Lustrous cylinders to about 2 cm. long. in matrix of other rare tin sulfosalts (incaite, franckeite, etc.). Crystals are absolutely unique - like pencil leads; long and round in cross-section. From Poopo, Oruro Dept., Bolivia. Miniature specimen about 1.6 inch across. (Iron Lead Tin Antimony Sulphide  FePb3Sn4Sb2S14 )   

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2834

Cyanotrichite ., from Arizona, a wonderfully coloured mineral. Its bright azure to sky blue colour is very impressive. Cyanotrichite typically forms acicular or hair like crystals aggregated into radial clusters, tufts and sprays. The colour is very impressive for such tiny crystals. It is an aptly named mineral since cyano and trich are derived from the Greek for blue and hair, respectively. It is formed from the oxidation of copper ore minerals along with other oxidation zone minerals.  Notable Occurrences include Laurium in Greece; Leadhills in Scotland; Russia; South Africa; Arizona, Nevada and Utah, USA and France . (Hydrated Copper Aluminium Sulphate Hydroxide. Cu4Al2SO4(OH)12.2H2O)

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Digenite (Copper Sulphide  Cu9S5 ))

 

2632

Dioptase - Tsumeb Mine, Tsumeb, Namibia. A half inch long perfectly formed dioptase crystal tops this aesthetic specimen. There are some smaller ones present that really set it off.  Size approx 16 x 14 x 7mm. (Hydrated copper silicate CuSiO2(OH)2 )

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2647

Dioptase and Colbaltian Dolomite from Tsumeb Mine, Namibia.  (Hydrated copper silicate CuSiO2(OH)2

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2572

Dioptase, a copper silicate ore, (CuSiO2(OH)2) on a white matrix from the type locality of Altyn Tyube, Kazakstan. Size 29 x 22mm. (Hydrated copper silicate CuSiO2(OH)2 ) . 

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2705

Dolomite and Siderite (Iron Carbonate) from Botallack Mine, Cornwall. (Calcium Magnesium Carbonate, CaMg(CO3)2). 

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2757

Dometkite (Copper Arsenide, Cu3As) from Mohawk Mine, Mohawk, Michigan with very rich metallic massive, minor intergrown calcite. Calcite has green stains & the Domeykite has a thin layer of red Cuprite. Size 59 x 43 x 25mm.  (Copper Arsenide, Cu3As).

 

2930

Duftite, Penberthy Croft, St. Hilary, Cornwall. The colour of duftite gives it its great note of distinction. The colour is usually an attractive green of one shade or another. It seems that the colour is often difficult to label and is given a variety of pleasant names. It has been described as pea-green, apple-green, grey-green, olive-green, lime green and dark green, it usually is quite attractive and a joy to possess in one's collection. (Lead Calcium Copper Zinc Arsenate Hydroxide (Pb,Ca)(Cu, Zn)AsO4(OH)),  

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2651

Enargite from Longfellow mine, Ouray County, Colorado, shiny black crystals of a copper-arsenic-sulphide ore .  (Copper Arsenic Sulphide Cu3AsS4 ) . 

 

2576

Erythrite as small but sharp purple crystals generously covering a black cobaltite matrix from Bou Azzer, Morocco.  Erythrite is a cobalt-arsenic ore  (Co 3 [AsO 4 ] 2 ·8H 2O) sometimes found in association with copper ores.  Size 54 x 35mm.  (Hydrated Cobalt Arsenate Co3(AsO4)2.8(H2O) ). 

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2893

Freibergite from Gilman, Colorado A sharp specimen of freibergite with pyrite from the Eagle mine, Gilman, Eagle County, Colorado. The specimen measures approximately 69 x 48 mm. The Eagle mine at Gilman, Colorado was a consolidation of many smaller operations, and was operated by New Jersey Zinc Company from 1912 until 1984. This mine was probably the most prolific producer of mineral specimens in Colorado history. Many different species have been collected from this mine over the years, but the mine is most well known for fine specimens of pyrite, sphalerite, dolomite, siderite, barite, chalcopyrite, rhodochrosite, and pyrite after pyrrhotite pseudomorphs. In total the mine 13 million tons of ore averaging 8.5% zinc, 1.5% lead, 0.7% copper, 6.6 ounces per ton silver, and 0.05 ounces per ton gold.  (Complex sulphide pyrite, (Ag,Cu,Fe)12(Sb,As)4S13.)

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2798

Fornacite from Shattuck Mine, Bisbee, Arizona with sparse minute micro greenish-brown crystals on more abundant blue-green Ajoite fibres exposed in veins 1-2 mm wide in rock. "Richest" on end opposite the sawed end. Matrix consists of Chrysocolla, Quartz  & "limonite". Ajoite is most abundant in the area on top of photo. 60 x 40 x 20mm. (also furnacite, a lead copper chromate arsenate hydroxide, Pb2Cu(CrO4)(AsO4)(OH)) 

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2608

Galena Crystals on Matrix.  This features numerous octahedrons of terminated grey and silver coloured galena crystals on a matrix of drusy marcasite coated dolomite. There are crystals on both the top and the bottom sides. The top features octahedrons to 13mm and the bottom features crystals to 9mm. The matrix features tiny white dolomite crystals, and drusy golden marcasites. It was collected from the Sweetwater Mine, Reynolds County, Missouri.  Size 110 x 85mm. (Lead Sulphide  PbS )  

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2706

Galena from Greystones Quarry (OS Ref: SX 362 794)  Lezant, near Launceston. Cornwall. (Lead Sulphide  PbS )

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2587

Galena and Pyrite from Keystone, Colorado showing a sharp cluster of numerous cubes of galena with pyrite after pyrrhotite and milky quartz, all on a matrix of sphalerite from the Keystone mine, Crested Butte, Colorado. The psuedomorphs of pyrite replacing pyrrhotite are very sharp on this specimen.  The Keystone Mine near Crested Butte, Colorado was operated by several different companies for silver, lead and zinc until 1977 when AMAX took over the property to explore for molybdenum.  Size 60 x 50mm. (Lead Sulphide, PbS )

 

2600

Galena and Quartz from Keystone, Colorado.  (Lead Sulphide, PbS)

 

2673

Galena from Snailbeach Mine, Shropshire.  (Lead Sulphide, PbS )

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2575

Heterogenite, a good specimen of the relatively rare Cobalt mineral from the Mashamba West Mine, near Kolwezi, Congo. The Heretogenite is black and bytroidal with some minor Chrysocolla  ((Cu,Al)2H2Si2O5(OH)4.H2O) as an associated mineral. Size 40 by 34 mm. (Cobalt oxide CoO(OH)).

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2610

Heterogenite on Chrysocolla Deep blue/green botroidal chrysocolla forms a glassy 1/8” thick layer across the entire top of this 4 ½” x 4” specimen. On top of the chrysocolla (Hydrated copper silicate) are shining glassy botroidal clumps of the rare cobalt mineral heterogenite. The heterogenite forms very nice botroidal “grapes” or “blackberries”. Heterogenite is a rare cobalt hydroxide mineral. The chrysocolla is much deeper green than is normal, and is much clearer than is normally seen. The locale is Kambove, Katanga, Zaire. (Cobalt oxide CoO(OH))

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2692

Heulandite from Botallack Mine, Cornwall. (Hydrated Calcium Sodium Aluminium Silicate (Ca,Na)2 - 3Al3(Al, Si)2Si13O36.12H2O) 

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2707

Hidalgoite from Hingston Down Quarry. (Lead Aluminium Arseno-sulphate PbAl3(AsO4)(SO4)(OH)6)   

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2693

Jamesonite from Port Quin  (OS ref SW 971 806)  St Endellion  North Cornish coast. (Lead Iron Antimony Sulphide Pb4FeSb6S14). 

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2694

Jasper from Greystones Quarry (OS ref SX 362 794)  Lezant, near Launceston. Cornwall. Jasper is a form of Chalcedony, covering varieties of cryptocrystalline quartz.

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Kinoite (Hydrated Calcium Copper Silicate Ca2Cu2Si3O10.2H2O )

 

2708

Langite and Brochantite from Penberthy Croft Mine.  Brochanite is Copper Sulphate Hydroxide,  Cu4(SO4)(OH)6  (Copper Sulphate Hydroxide, Cu4(SO4)(OH)6.2(H2O))

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2774

Langite, Bedford United Mine, from the Marquis Lode in this famous mine at Gulworthy, Tavistock, Devon. Iron stained killas matrix with a scattering of tiny turquoise coloured crystals of langite. Size 60 x 40 x 30mm

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9376 Lavendulan Mineral Specimen, an uncommon copper arsenate mineral, known for its characteristic intense electric blue colour. NaCaCu5(AsO4)4Cl.5H2O. Ores2

6100

LIBETHENITE TURQUOISE & APATITE GUNHEATH CORNWALL Spread of sparkling micro-crystals of libethenite on granite with turquoise var. rashleighite and small blue apatite crystals - from Gunheath CCP, St. Austell, Cornwall. Collected nearly 20 years ago.  Measures 105mm x 60mm x 40mm. Apatite crystals typically 1mm.  Libethenite is similar to olivenite. It has an emerald green colour and bright lustre. (Copper Phosphate Hydroxide, Cu2PO4(OH)) 

 

2709

Linarite and Galena from Greystones Quarry (OS ref: SX 362 794)  Lezant, near Launceston. Cornwall. (Lead Copper Sulphate Hydroxide PbCuSO4(OH)2 ) .

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9369 Linarite with Fluorite Mineral Specimen combined copper lead sulphate hydroxide with formula PbCuSO4(OH)2. Linarite occurs as monoclinic prismatic to tabular crystals and irregular masses. It is easily confused with azurite, but does not react with dilute hydrochloric acid as azurite does. Linarite was first identified in 1822. It is named after the Linares Plateau, Spain. Ores2

2837

Lindgrenite, having an olive-green crust of copper-molybdenum ore scattered on highly altered granitic matrix, from the Childs-Aldwinkle Mine, Copper Creek district, Pinal County, Arizona. It was named after Waldemar Lindgren who established that most metallic ore deposits are emplaced by hot solutions from below, and first found in that greatest of holes in the ground, Chuquicamata Copper Mine, Chile. Miniature size specimen about 1½” tall. (Copper molybdate Cu3(MoO4)2 (OH)2 )  

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2731

Liroconite from the Ting Tang Mine near St. Day Cornwall. (Hydrated Copper Aluminium Arsenate Hydroxide Cu2Al(AsO4)(OH)4.4H2O ). 

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2592

Listwanite This rusty red quartz gold bearing material came from a river in Western Washington State, where Jade can also be found. It is closely related to chrysophrase.

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Mimetite , (Lead Chloroarsenate Pb5(AsO4)3Cl ) see also campylite

 

2931

Mixite, from Penberthy Croft, St. Hilary, Cornwall. Mixite, one of a small number of Bismuth minerals. It is a rare mineral forming in the weathering zones of copper deposits that contained other bismuth sulphides. Mixite is a particularly attractive collectors specimen. It forms spherules, wonderful radial clusters, made up of fine needle-like crystals. The colour is almost always a deep green made even more attractive by a silky lustre.  (Hydrated Copper Bismuth Arsenate Hydroxide BiCu6(AsO4)3(OH)6.3H2O ). 

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2932

Mottramite   Penberthy Croft, St. Hilary, Cornwall.  Mottramite can form sparkling crusts that have a nice lustre and striking green colour. (various shades of green) Crystal Habits are typically tiny drusy crusts, radiating and stalactitic masses. (Cuprodescloizite,  Lead Copper Vanadinate Hydroxide PbCu(VO4)(OH) ).

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2671

Malachite & Chrysocolla -  This nice example of Malachite & Chrysocolla is from the Kolwezi, Democratic Republic Of The Congo. This piece displays concentric banding of green Malachite & Chysocolla of turquoise/blue hue with an coating of very dark green  druzy Malachite.  Opaque with a vitreous lustre. (Hydrated copper carbonate Cu2(CO3)(OH)2 )

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2509

Malachite & Chrysocolla -  This nice example of Malachite & Chrysocolla is from the Kolwezi, Democratic Republic Of The Congo. This piece displays concentric banding of green Malachite & Chysocolla of turquoise/blue hue with an coating of very dark green  druzy Malachite.  Opaque with a vitreous lustre.  Measures 65 x 45 x 15mm - Weight is 60 grams.  (Hydrated copper carbonate Cu2(CO3)(OH)2 )

 

2432

Malachite / Turquoise / Quartz  from a private mine in Northern Santa Cruz Co.,AZ. a splendid specimen that could be cut to cabochons. Malachite, turquoise, quartz, red hematite, minor gold in box works.  Size 80 x 60 x 30mm.  (Hydrated copper carbonate Cu2(CO3)(OH)2 )

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2588

Malachite as a sharp psuedomorph of malachite replacing azurite from Bisbee, Cochise County, Arizona. Size 45 x 33 mm.  (Hydrated copper carbonate Cu2(CO3)(OH)2

 

2667

Malachite in botryoidal form with a dark green hue and a dark green drusy coating. Shows concentric banding pattern on edge. Democratic Republic of Congo.  Size 92 x 45 x 30mm, weight 183 g. (Hydrated copper carbonate Cu2(CO3)(OH)2 ).  

 

2515

Botryoidal Malachite that can easily be seen with a loupe.(Photo's do not do this specimen justice). Overall Size: 4.5cm x 2.2cm x 3.0cm From: Tolvaddon Mine, Marazion, Cornwall.  (Hydrated copper carbonate Cu2(CO3)(OH)2

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2363

Malachite, dioptase and gold sulphide in crystalline quartz from the Gold Bar Mine in O'Brien's Gulch, Amazon Gorge.  (Hydrated copper carbonate Cu2(CO3)(OH)2 ). 

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2710

Marcasite from Wheal Mary Ann.  It is an Arabic or Moorish name for pyrites and similar material of uncertain origin. (Iron Disulphide, FeS2 ).

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Meta-zeunerite (Hydrated Copper Uranyl Arsenate Cu(UO2)2(AsO4)2.8H2O )

 

2836

Millerite, normally found as nearly invisible hairs in some geodes, this is a specimen of nearly solid mineral! It is made of densely packed radiating sharp metallic needles, with kind of a greenish-brassy colour. It came from the Thompson Open Pit, Thompson, Manitoba. Thumbnail specimen, about 0.8 inch across. (Nickel sulphide  NiS )

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9342 Mohawkite, polished - a mixture of copper, algodonite, and domeykite, the latter two being rare copper minerals, chemical formula from: Cu3As up to Cu6As. Named after the Mohawk Mine, Houghton, Keweenaw, Michigan. Ores2

 

Mottramite (Lead Copper Vanadinate Hydroxide PbCu(VO4)(OH))

 

2797

Murdochite from Gila Coounty, Arizona via the Alice Noble collection.  Mentioned as being rare at this locality in the mineralogy of Arizona. Black frosting of minute micro crystals on 1-2 mm blue-green Smithsonite crystals on a 25 x 23mm area on top of rock. Most of specimen is microcrystalline Hemimorphite & Smithsonite. 62 x 50 x 46mm. (Complex copper lead oxide Cu6PbO7.52(Cl,Br) )   

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2736

Olivenite from the Ting Tang Mine near St. Day Cornwall.  (Copper Arsenate Hydroxide Cu2AsO4(OH) ).   

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2696

Olivenite from Wheal Gorland SW 730 427 St Day, Gwennap. Cornwall. (Copper Arsenate Hydroxide Cu2AsO4(OH) ).  

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2697

Olivenite from Wheal Gorland SW 730 427 St Day, Gwennap. Cornwall. (Copper Arsenate Hydroxide Cu2AsO4(OH) ).   

 

2823

Olivenite, Uncommon Secondary Copper; Nevada Olive-green (what a surprise!) acicular crystals in vug of limonitic matrix. Uncommon location: Simon Mine, in Mineral County. Copper Arsenate Hydroxide, Thumbnail specimen, about 27mm tall. (Copper Arsenate Hydroxide Cu2AsO4(OH) ).    

 

 

Papagoite  (Calcium Copper Aluminium Silicate Hydroxide CaCuAlSi2O6(OH)3  )   

 

2667

Peacock ore. This is a copper-iron-sulphur ore of the chalcopyrite group named after its shimmering colours. (Bornite,  (Cu5FeS4)).  

 

2656

Peacock ore, a copper-iron sulphide aptly named after its shimmering colours.  Origin Colorado.  (Bornite,  (Cu5FeS4)) 

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2735

Pharmacosiderite from the Ting Tang Mine near St. Day Cornwall. (Hydrated Potassium Iron Arsenate Hydroxide. KFe4(AsO4)(OH)4.7H2O)

 

2698

Pharmacosiderite from Wheal Gorland.  (Hydrated Potassium Iron Arsenate Hydroxide  KFe4(AsO4)(OH)4.7H2O).

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Plancheite (Hydrated Copper Silicate Hydroxide  Cu8Si8O22(OH)4.H2O )

 

2812

Polybasite-Pearcite from Mexico Fresnillo, Zacatecas, Mexico is famous for its wealth of silver minerals. This is a nice specimen of silver sulphosalt, either polybasite or pearceite.  They appear the same but can be identified by analysis. Size is 17x16x16mm. (Silver Copper Antimony Sulphide (Ag,Cu)16Sb2S11 ).  

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2817

Polybasite-Pearcite from Mexico Fresnillo, Zacatecas, Mexico is famous for its wealth of silver minerals. THis is a nice specimen of silfer sulfosalt. One ca't tell without special analysis whether this is polybasite or pearceite. Size is 17 x 16 x 16 mm.  (Silver Copper Antimony Sulphide (Ag,Cu)16Sb2S11

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6106

PSEUDOBOLEITE: Santa Catalina Mine, Sierra Gorda, Chile  Pseudoboleite occurs here as blue masses of micro-crystals intermixed with a limonitic matrix. Other minerals such as hemimorphite are often present. An excellent specimen for microscope viewing, this is XRD-confirmed material. This uncommon mineral measures 60x30mm.  Pseudoboleite (Hydrated Lead Copper Chloride Hydroxide Pb5Cu4Cl10(OH)8.2H2O  )

 

2652

Pyrite as large crystals together with chalcocite (copper sulphide) from Zacatecas, Mexico.  (Iron sulphide  FeS2 )

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2621

Pyrite and Sphalarite on Quartz Group.  (Iron sulphide  FeS2 )

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2599

Pyrite cluster from Gilman, Colorado. (Iron sulphide  FeS2

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2789

Pyromorphite It has fantastic small bright pale green crystals covering the one end of its matrix and inside the two fissures it has more crystals. It measures 5.5 cm x 3.5 cm and originated from Santa Eufemia, Spain. (Lead Chlorophosphate, Pb5Cl(PO4)3 ).  

 

2699

Pyromorphite from Trevinnick Mine  (Green Lead Ore, Lead Chlorophosphate, Pb5Cl(PO4)3 )  

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2927

Pyromorphite. .  Location: Penberthy Croft, St.Hilary, Cornwall. (Green Lead Ore, Lead Chlorophosphate, Pb5Cl(PO4)3 )  

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Quetzalcoatlite (Zinc Copper Tellurite Hydroxide Zn8Cu4(TeO3)3(OH)18  )

 

2793

 Rashleighite, a form of green Turquoise with many vughs of green Turquoise in a grey quartz matrix. It is from a classic Cornish locality. Size 75 x 50 x 25mm.

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9375 Renierite (Germanium) Specimen, a rare copper-zinc-germanium bearing sulphide mineral. It occurs at the Kipushi Mine, Democratic Republic of the Congo. Renierite was named after Armand Renier, a Belgian geologist and Director of the Belgian Geological Survey. (Cu,Zn)11(Ge,As)2Fe4S16. Ores2

2778

Rhodonite and Pyrolusite  Specimen of light pink Rhodonite  with black Pyrolusite (Manganese Dioxide) from an old abandoned Cornish Manganese mine. Size approx 125 x 75 x 35mm.  (Manganese Iron Magnesium Calcium Silicate (Mn,Fe,Mg,Ca)5(SiO3)5 )

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2818

Beautiful Rose Quartz Sphere, 20mm diameter.

 

2826

Rosasite as pale blue spherules scattered over nicely contrasting limonite matrix. From the Omega Mine, Helvetia district, Pima County. Arizona.  Thumbnail specimen about 1.2 inches across. (Copper zinc carbonate hydroxide (Cu, Zn)2CO3(OH)2 )  .

 

2711

Schorl  Complex AluminumBoroSilicate of the tourmaline group from Hingston Down Quarry. (Sodium Iron Aluminum Boro-silicate Hydroxide NaFe3(Al,Fe)6Si6O18(BO3)3(OH)4 ). 

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2732

Scorodite .   from the Ting Tang Mine near St. Day Cornwall. (Hydrated Iron Arsenate, FeAsO4.2H2O ) 

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2734

Scorodite & Olivenite, from the Ting Tang Mine near St. Day Cornwall. ( Copper Arsenate Hydroxide Cu2AsO4(OH)).  

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2733

Scorodite & Pharmocosiderite  from the Ting Tang Mine near St. Day Cornwall. ( Copper Arsenate Hydroxide Cu2AsO4(OH)).  

 

2612

Selenite, colourless form of gypsum, from Colorado in the form of a cluster of flattened crystals. The main crystal is a double terminated 3 ½” crystal. Radiating from it are 1/8” to 5/8” selenites. The overall dimensions are 3½” x 2”. There is a second specimen that has crystals. (Hydrated Calcium Sulphate CaSO4.2(H2O) ).    

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2756

Shattuckite  from New Cornelia Mine, Ajo, Arizona with moderately rich dark blue platy cleavages with minor Ajoite in Hematite. Micromount pockets to 7 mm sparsely scattered throughout rock.  From the Harry Metz collection, a geologist who worked nearby for 50 years.  Size 60 x 37 x 30mm.  (Copper Silicate Hydroxide Cu5(SiO3)4(OH)2 ).

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2873

Shattuckite & Chrysocolla, cabinet specimen from Congo. A large specimen containing the minerals shattuckite, chrysoccola and possibly another unidentified one. The specimen includes a piece of what appears to be basaltic rock, covered with a crust of 2-4mm of Chrysocolla. Most of the surface of the Chrysocolla is covered with a sparkly coating of crystalline shattuckite, and on that, there are a couple of patches of the mystery mineral.  (Copper Silicate Hydroxide Cu5(SiO3)4(OH)2 ).

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2695

Siderite from Wheal Drea Mine. (Iron Carbonate,  FeCO3).

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2713

Siderite from Wheal Drea Mine. SW 366 323   St Just. Cornwall   (Iron Carbonate,  FeCO3)

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2611

Smithsonite This mineral was called calamine when it was used  for direct cementation with copper to make brass.  It was renamed in honour of the British chemist who founded the Smithsonian Institution.  This is classic lime green smithsonite is from the 79 Mine, Hayden, Arizona.. The smithsonite forms the classic “melted wax” botryoidal layers of crystals, and covers all faces of the specimen. Size 32 x 36mm. (Zinc carbonate, ZnCO3

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2630

Smithsonite as yellow crystals deposited on Dolomite.  The yellow colour is due to the inclusion of greenockite in the smithsonite. Sample from Philadelphia Mine, Rush, Arkansas.  Smithsonite is zinc carbonate, ZnCO3. named for James Smithson, the founder of the Smithsonian Institution.  Size 25 x 20 x 19mm. (Zinc carbonate, ZnCO3 ).  

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2620

Smithsonite with lemon-yellow 'Turkey Fat' colour.  (Zinc carbonate, ZnCO3 ). 

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2606

Smithsonite, blue. This specimen features botroidal baby blue smithsonite in vugs on all sides of the massive smithsonite matrix. The blue lustre is the classic “melted wax”, and is attractive. Good banding can be seen as well.  The locale was Choix, Sinaloa, Mexico.  Size 110 x 60mm. (Zinc carbonate, ZnCO3 ).  

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2469

Smithsonite from Level 8, San Antonio Mine, Santa Eulalia, Chihuaha, Mexico. (Zinc carbonate, ZnCO3 ).  

 

2567

Smithsonite in light green bytroidal form from the San Antonio Mine, Santa Eulalia, Mexico. The specimen is similar in many respects to the beautiful smithsonites from the Kelly Mine in New Mexico. Smithsonite is Zinc Carbonate, Calamine, formula ZnCO3.  Size 30 x 25mm.

 

2637

Smithsonite from San Antonio, Mexico, a sharp specimen of green smithsonite perched on a matrix of goethite (hydrated iron oxide) from 8th level of the San Antonio mine, Santa Eulalia, Chihuahua, Mexico. The spheres of smithsonite stand out nicely on the matrix. Size 45 x 20mm.  (Zinc carbonate, ZnCO3

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2714

Smokey Quartz from East Wheel Buckets

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9367 Sonora Sunrise (sometimes Senora Sunrise). It is made up of Chrysocolla, which is a beautiful blue, and Cuprite, which has some great red variations and is found in Mexico. This piece measures approx. 78 x 43 x 18mm. Ores2

2674

Spalerite (Sphalerite), , Snailbeach Mine, Shropshire.  (Zinc Iron Sulphide (Zn,Fe)S).

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2810

Spangolite from Blanchard Mine spangolite crystals scattered about on matrix from the Blanchard Mine in Bingham, New Mexico. Collected by Ray DeMark a few years back. Size is 30 by 24 by 15 mm. (Copper Aluminium Sulphate Chloride Hydroxide Cu6Al(SO4)Cl(OH)12.3H2O )   

 

2815

Spangolite from Blanchard Mine   spangolite crystals scattered about on matrix from the Blanchard MIne in Bingham, New Mexico. Collected by Ray DeMark a few years back. Size is 30 by 24 by 15 mm.  (Copper Aluminium Sulphate Chloride Hydroxide Cu6Al(SO4)Cl(OH)12.3H2O )  

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2775

Stibnite from Baia Spric, Romania,  Small group of elongated metallic crystals, some terminations 20 x20 x10mm.  (Antimony Sulphide Sb2S3).

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2726

Stromeyerite from Uzbekistan showing copper-silver veins where silver replaces copper in Bornite (Copper Iron Sulphide Cu5FeS4).  (Silver-copper-sulphide, AgCuS).   

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2821

Teallite, Lustrous metallic foliated crystalline structure which is very typical of the rare species. From Carguaicollo, Potosi Department, Bolivia.   (Tin-Lead Sulphide PbSnS2 ).

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Tennantite (Copper Arsenic Sulphide  Cu12As4S13 )

 

2747

Tetrahedrite. This is a very special specimen of massive Tetrahedrite as its matrix and in its perfect termination and crystallization process. There are a few clusters of beautiful Quartz Crystals, also all very nice. An extra treat comes with this specimen and that is, is completely dusted with Chalcopyrite Powder. It just glistens. Just a fine coating of pyrite. This piece weighs a nice 2.1 Pounds and measure 5½"x 4½”. (Copper Antimony Sulphide Cu12Sb4S13

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2614

Torbernite a copper-uranium ore   These crystals come from Namibia having clusters of bright and dark green torbernite crystals are on all faces of this specimen. The individual crystals are 1 to 3mm long. and the overall dimensions are . This is and is mildly radioactive.  Size 47 x 35mm (1 7/8” x 1 3/8”).  (Hydrated Copper Uranyl Phosphate  Cu(UO2)2(PO4)2.10H2O).

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2712

Tourmaline in radial form from Botallack Mine, Cornwall.  Check pic for type against:  http://www.galleries.com/minerals/silicate/tourmali.htm  None seem to contain copper. 

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2601

Turquoise azurite, malachite and silver from the 85' level of the No 2 shaft of the Iona silver, copper and gold mine in the Hieroglyphic Mountains of Western Arizona.  This was originally a copper and gold occurrence which was later altered by an igneous intrusion, (red picacho) and broken up by geological activity, then re-cemented in hydrothermal solution  ("brecciated") bearing copious quantities of calcium, manganese, boron, and tungsten silicates along with large amounts of silver.  When cut, this shows a wild "mosaic" pattern of bright blue spider webbed turquoise, deep intense blue azurite, bright green malachite and flashy native silver in a spectacular hard brown quartz matrix.  The exterior is rather oxidized, but what is found inside most is large enough for two 50mm spheres along with hundreds of cabs, this specimen is 125 x 112 x 77mm (5" x 4 1/2" x 2 1/2") and weighs   1550g,  (3.5lb). (Hydrated Copper Aluminium Phosphate  CuAl6(PO4)4(OH)8.5(H2O),). 

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2364

Turquoise, dioptase and cuprite from Constellation, Arizona.  It is from the 225 foot level of the No 3 shaft.  (Hydrated Copper Aluminium Phosphate  CuAl6(PO4)4(OH)8.5(H2O),).

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2525

Turquoise from Gunheath Clay Pit, Bugle, in Cornwall.  This is the green variety known as Rashleighite and is rich solid Turquoise in a milky quartz matrix.  Size 75 x 50 x 50mm (3 x 2 x 2 inches). (Hydrated Copper Aluminium Phosphate  CuAl6(PO4)4(OH)8.5(H2O),). 

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2803

Vanadinate on Hollandite with well shaped Vanadinite crystals which have formed onto the botryoidal crystals of Hollandite. It originated in Taus, Morocco.  Size 70 x 60mm, weight 290g.  (Lead Chlorovanadate Pb5(VO4)3Cl)

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9368 Vanadinite, another specimen as usually found in the form of red hexagonal crystals. It is formed by the oxidation of lead ore deposits such as galena. First discovered in 1801 in Mexico, vanadinite deposits have since been unearthed in South America, Europe, Africa, and other parts of North America. From Morocco this lovely little example measures approx. 30 x 20 x 18mm, with crystals up to 11mm across.  

6102

Vandenbrandeite - Rare - Musonoi, Katanga, Zaire   approximate size of the specimen is: 2.7cm, Width=2cm, Thickness=1cm.  Well outbid.  Vandenbrandeite    Cu(UO2)(OH)4

 

2628

Violarite + Millerite (Nickel Sulphide) + Pentlandite.(Iron Nickel Sulphide (Fe,Ni)9S8).Colorado   The sample is composed of Violarite, Millerite, Pentlandite, and possibly other unidentified minerals. It is from the Copper King Mine, Gold Hill District, Boulder County, Colorado.  Size 65 x 50 x 25mm.  (Iron-Nickel Sulphide FeNi2S4)

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2715

Wollastonite  from Greystones Quarry Lezant, near Launceston. Cornwall. (Calcium Silicate, CaSiO3).  

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2615

Wulfenite and mimetite -  Mexico This item has gemmy bright orange “windowpane” wulfenite crystals to 12mm length along with botryoidal orange/yellow mimetites on goethite matrix. The wulfenites are nicely terminated crystals. The locale is San Carlos, Chihuahua, Mexico.  Wulfenite is on Mimetite, a lead chloroarsenate Pb5[Cl|(AsO4)  Size 25 x 25mm.  (Lead-molybdenum oxide (PbMoO4) ). 

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2616

Wulfenite as bright yellow wulfenite crystals on a white barite matrix from the Toussit Mine, Oujeda, Morocco. Wulfenites are rare from this locale. There are wulfenites on all sides of the specimen, ranging in size from 1 to 6mm. Overall dimensions are 30 x 22mm (1 ¼” x 7/8”). (lead-molybdenum oxide (PbMoO4)).  

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6101

 

Zeunerite - Grandview Mine, Coconino Co.,AZ  a thumbnail size specimen from the Grandview Mine, Coconino County, Arizona. The approximate size of the specimen is: 19 x 13mm x 4mm.   Zeunerite (Hydrated Copper Uranyl Arsenate -

Cu(UO2)2(AsO4)2 .10-16H2O)

 

 9380

Zincite a crystalline zinc oxide with a hardness of 4 and a hexagonal crystal system. In nature, Zincite condenses and crystallises very rarely, it has been found grown accidentally in the condensing vents of old zinc smelting plants.  This sample came from Poland some years ago. Zincite varies in colour with impurities and may be grey, green, orange or red.  (ZnO).

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