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Ore Mineral Specimens 4

Tuesday, 29 September 2015 03:00 PM

Introducing the "Ore Mineral Specimens 4" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including chalcopyrite, chromite, cuprite, and galena and more from places like Hingston Down quarry, Gunnislake, Cornwall, England, Copper Queen mine, Bisbee, Cochise Co., Arizona, United States, Concepcion del Oro, Zacatecas, Mexico, Selukwe deposit, Great Dyke, Zimbabwe, Butte dist., Silver Bow Co., Montana, United States, and Balmat, St. Lawrence Co., New York, United States.

Chalcopyrite

#PD31696
Locality
Hingston Down quarry, Gunnislake, Cornwall, England 
Formula
Cu1+Fe3+S2 
Availability
Sold
Size
6 x 4.5 x 3.5 cm - Sm Cabinet 
Tagged
sulfide , copper  

Massive brassy gold Chalcopyrite. Comes with an old Lythe Minerals label.


Chalcopyrite

Formula
Cu1+Fe3+S2 
Crystal System
Tetragonal 
Crystal Habit
Euhedral Crystals, Striated, Druse 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
brass yellow, honey yellow 
Streak
greenish black 
Class
Tetragonal - Scalenohedral 
Fracture
Brittle 
Hardness
3.5 
Collection
Phillips Collection

Chalcopyrite

with Chalcocite - #PD36335
Locality
Copper Queen mine, Bisbee, Cochise Co., Arizona, United States 
Formula
Cu1+Fe3+S2 
Availability
Sold
Size
8 x 7.5 x 5 cm - Sm Cabinet 
Tagged
sulfide , copper  

A nice chunk of brassy gold Chalcopyrite with dull grey Chalcocite, Galena and Quartz. About half of the specimen is Quartz and a green granular matrix, perhaps the country rock.


Chalcopyrite

Formula
Cu1+Fe3+S2 
Crystal System
Tetragonal 
Crystal Habit
Euhedral Crystals, Striated, Druse 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
brass yellow, honey yellow 
Streak
greenish black 
Class
Tetragonal - Scalenohedral 
Fracture
Brittle 
Hardness
3.5 
Collection
Phillips Collection

Chalcopyrite

on Sphalerite - #PD42822
Locality
Concepcion del Oro, Zacatecas, Mexico 
Formula
Cu1+Fe3+S2 
Availability
Sold
Size
13 x 10 x 5 cm - Cabinet 
Tagged
sulfide , copper  

Large cabinet specimen totally covered with goldish, iridescent Chalcopyrite crystals to 1cm and associated with 3-6mm Calcite crystals. The backside is completely covered with Calcite crystals of the same size. This is a large cabinet specimen and will cost extra to ship overseas. Ex. Ralph Merrill collection.


Chalcopyrite

Formula
Cu1+Fe3+S2 
Crystal System
Tetragonal 
Crystal Habit
Euhedral Crystals, Striated, Druse 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
brass yellow, honey yellow 
Streak
greenish black 
Class
Tetragonal - Scalenohedral 
Fracture
Brittle 
Hardness
3.5 

Chromite

#PD42808
Locality
Selukwe deposit, Great Dyke, Zimbabwe 
Formula
Fe2+Cr2O4 
Availability
Sold
Size
10 x 6 x 5 cm - Cabinet 

A solid black granular & crystalline mass of Chromite ore. 

The USGS reports the following on chromium: Chromium is refined into ferrochromium used to produce stainless steel. South Africa is the leading chromite ore producer and China is the leading chromium -consuming country. South Africa and Kazakhstan hold about 95% of the world's chromium resources. The Stillwater complex in Montana is the U.S. resource base.

The Great Dyke holds Zimbabwe's chromium deposits.


Chromite

Formula
Fe2+Cr2O4 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Granular, Nuggets 
Cleavage
None, None, None 
Luster
Metallic 
Color
black, brownish black 
Streak
brown 
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
5.5 
Collection
Phillips Collection
Mineralpedia
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Previously Sold Chromite
On Dakota Matrix
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Cuprite

with Malachite - #PD36339
Locality
Butte dist., Silver Bow Co., Montana, United States 
Formula
Cu1+2
Availability
Sold
Size
5.5 x 5.5 x 3 cm - Sm Cabinet 
Tagged
copper  

Purple-red massive Cuprite with green Malachite.

Originally explored in 1864 for gold, the Butte mining district later became one of the largest producing copper districts in the World. 


Cuprite

Formula
Cu1+2
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Capillary 
Cleavage
Imperfect, None, None 
Luster
Adamantine 
Color
brown red, purple red, red, black 
Streak
brownish red 
Class
Isometric - Hexoctahedral 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Phillips Collection
Mineralpedia
View Cuprite
On Dakota Matrix
Previously Sold Cuprite
On Dakota Matrix
Other Available Cuprite
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Galena

with Sphalerite - #PD42809
Locality
Balmat, St. Lawrence Co., New York, United States 
Formula
PbS 
Availability
Sold
Size
12 x 8 x 4 cm - Cabinet 
Tagged
sulfide  

Coarse crystalline Galena with fine-grained brown Sphalerite. 


Galena

Formula
PbS 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Massive - Granular, Massive 
Cleavage
Perfect, Perfect, Perfect 
Luster
Metallic 
Color
light lead gray, dark lead gray 
Streak
grayish black 
Class
Isometric - Hexoctahedral 
Fracture
Brittle 
Hardness
2.5 
Collection
Phillips Collection
Mineralpedia
View Galena
On Dakota Matrix
Previously Sold Galena
On Dakota Matrix
Other Available Galena
WebMineral
View Galena
Mindat
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