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Recently Released Special Editions

Ore Minerals

Friday, 30 May 2025 10:30 AM

Introducing the "Ore Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including chalcopyrite, chromite, copper, and covellite and more from places like Harz, Lower Saxony, Germany, Webster Chromite prospects, Jackson Co., North Carolina, United States, Stillwater mine, Nye Co., Montana, United States, Cashin mine, Montrose Co., Colorado, United States, Bisbee, Cochise Co., Arizona, United States, and Butte dist., Silver Bow Co., Montana, United States.

Chalcopyrite - WR65763
Chalcopyrite - WR65763

Chalcopyrite

#WR65763
Locality
Harz, Lower Saxony, Germany 
Formula
Cu1+Fe3+S2 
Availability
Available
Price
$75.00
Size
11 x 8 x 5 cm - Cabinet 
Tagged
ore mineral , sulfide , copper  

Large chunk of totally all Chalcopyrite from this famous mining region.


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 
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Chromite - 58131
Chromite - 58131

Chromite

#58131
Locality
Webster Chromite prospects, Jackson Co., North Carolina, United States 
Formula
Fe2+Cr2O4 
Availability
Sold
Size
7 x 5.5 x 5 cm - Sm Cabinet 
Tagged
ore mineral  

 

Heavy rich mass of black Chromite. There does not appear to be any crystals. There is minor Peridotite attached on one side. Apparently the deposit occurs as an ultramafic ring comprised of dunite, websterite, and enstatite, and pyroxenite. This ring is an ellipsoid with the largest dimension being six miles. More information can be seen at this link THE WEBSTER-ADDIE ULTRAMAFIC RING. 

 


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 
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Chromite - 65790
Chromite - 65790

Chromite

ore - #65790
Locality
Stillwater mine, Nye Co., Montana, United States 
Formula
Fe2+Cr2O4 
Availability
Sold
Size
17 x 12 x 10 cm - Cabinet 
Tagged
ore mineral  

A large chunk of Chromium ore from the Stillwater mine which is famous for its palladium and platinum minerals. 

Though not producing Chromite ore, this large 30 mile complex of layered, mafic igneous rock currently does not produce chromium ore. It is currently mined for its platinum and palladium only. Ore specimens are hard to obtain.

Chromium is widely used in chemicals, metals and refractory materials. Used to harden iron, nonferrous alloys and steel. The addition of 10% chromium also creates corrosion and oxidation resistant alloys such as stainless steel. According to the USGS Minerals Commodity Summary of 2106, about 95% of the world’s chromium resources is geographically concentrated in Kazakhstan and southern Africa; U.S. chromium resources are mostly in the Stillwater Complex in Montana although not currently producing chromium. 


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 
Mineralpedia
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Copper - AH65792
Copper - AH65792

Copper

#AH65792
Locality
Cashin mine, Montrose Co., Colorado, United States 
Formula
Cu 
Availability
Sold
Size
20 x 11 x 4 cm - Cabinet 
Tagged
ore mineral , native element  

A large specimen of about 50% Copper showing crude arborecent growth. According to Eckel 1961, USGS Bull. 1114 page 114 the Cashin mine produced masses of Copper. One Copper mass weighed 500 lbs.  The Copper at this mine was often associated Covellite, Chalcocite, Bornite, Cuprite, and native Silver. 


Copper

Formula
Cu 
Crystal System
Isometric 
Crystal Habit
Nodular, Arborescent 
Cleavage
None, None, None 
Luster
Metallic 
Color
brown, copper red, light pink, red 
Streak
rose 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Collection
Arnold G Hampson Collection
Mineralpedia
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Copper - 65860
Copper - 65860

Copper

#65860
Locality
Bisbee, Cochise Co., Arizona, United States 
Formula
Cu 
Availability
Available
Price
$395.00
Size
16 x 9 x 5 cm - Cabinet 
Tagged
ore mineral , native element  

Large Copper specimen with crude crystals from historic mining district.


Copper

Formula
Cu 
Crystal System
Isometric 
Crystal Habit
Nodular, Arborescent 
Cleavage
None, None, None 
Luster
Metallic 
Color
brown, copper red, light pink, red 
Streak
rose 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Mineralpedia
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Covellite - 65865
Covellite - 65865

Covellite

#65865
Locality
Butte dist., Silver Bow Co., Montana, United States 
Formula
CuS 
Availability
Sold
Size
5.5 x 4 x 4 cm - Sm Cabinet 
Tagged
ore mineral , sulfide , copper  

Covellite showing incredible iridescent colors. Covellite is loaded with 66% copper and is a beautiful indigo blue color. Covellite is formed in supergene of copper porphyry deposits and hydrothermal deposits, such as Butte, Montana. There is also Pyrite in the matrix giving it a nice contrasting appearance.


Covellite

Formula
CuS 
Crystal System
Hexagonal 
Crystal Habit
Platy, Foliated 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
indigo blue, light blue, dark blue, black 
Streak
black gray 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle 
Hardness
1.5-2 
Mineralpedia
View Covellite
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Previously Sold Covellite
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Mindat
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