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Ore Minerals

Thursday, 02 June 2022 08:00 AM

Introducing the "Ore Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including chalcocite, chalcopyrite, chromite, cinnabar, coloradoite, and copper and more from places like Ferris-Haggarty mine, Encampment dist., Carbon Co., Wyoming, United States, Equity mine, Bulkley Valley of the Northern Interior , British Columbia, Canada, Webster Chromite prospects, Jackson Co., North Carolina, United States, unknown mine, California, United States, Perseverance Gold mine, Kalgoorlie-Boulder, Western Australia, Australia, and Keweenaw Co., Michigan, United States.

Chalcocite

with Chalcopyrite - copper ore - #58564
Locality
Ferris-Haggarty mine, Encampment dist., Carbon Co., Wyoming, United States 
Formula
Cu2
Availability
Sold
Size
7 x 56 x 7 cm - Cabinet 
Tagged
sulfide , copper , ore specimen  

Greyish black Chalcocite with iridescent Chalcopyrite in host rock. The Ferris-Haggarty mine was an important copper mine and produced an estimated 21 million pounds of copper. in the early 1900's. Accordning to the website Western Mining History the deposit contains 928,000 tins of copper ore at 6.5% Cu and 116,800 oz Au. This specimen was pulled from an ore carts encountered during activity in the late 1990's. 


Chalcocite

Formula
Cu2
Crystal System
Monoclinic 
Crystal Habit
Massive, Granular, Euhedral Crystals 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
blue black, gray, black, black gray, steel gray 
Streak
grayish black 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
2.5-3 

Chalcopyrite

- copper ore - #49105
Locality
Equity mine, Bulkley Valley of the Northern Interior , British Columbia, Canada 
Formula
Cu1+Fe3+S2 
Availability
Sold
Size
10 x 11.5 x 8 cm - Cabinet 
Tagged
sulfide , copper , ore specimen  

Chalcopyrite is the most widely occuring copper ore containing 35% copper. The Equity Silver mine was discovered in 1967 and was under production by 1980 and ceased in 1993. It is a high grade vein deposit and is currently under exploration by Equity Metals Corporation. This specimen is an impressive chunk of brassy gold Chalcopyrite.


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
Chris van Laer Collection

Chromite

- chromium ore - #BW58130
Locality
Webster Chromite prospects, Jackson Co., North Carolina, United States 
Formula
Fe2+Cr2O4 
Availability
Sold
Size
7 x 5 x 4 cm - Sm Cabinet 
Tagged
ore specimen  

 A solid black granular & crystalline mass of Chromite ore with some alterations to Erythrite.

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, although not currently producing chromium.

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.


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
Bill Wilson Collection
Mineralpedia
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Previously Sold Chromite
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Cinnabar

- mercury ore - #45914
Locality
unknown mine, California, United States 
Formula
HgS 
Availability
Sold
Size
7.5 x 6 x 3 cm - Sm Cabinet 
Tagged
sulfide , ore specimen  

Red fine-grained Cinnabar on a vein of Pyrite and partially coated Pyrite.


Cinnabar

Formula
HgS 
Crystal System
Trigonal 
Crystal Habit
Druse, Disseminated, Massive 
Cleavage
Perfect, None, None 
Luster
Adamantine 
Color
lead gray, brown, brown pink, vermilion, gray 
Streak
bright red 
Class
Trigonal - Trapezohedral 
Fracture
Brittle - Sectile 
Hardness
2-2.5 
Collection
Chris van Laer Collection
Mineralpedia
View Cinnabar
On Dakota Matrix
Previously Sold Cinnabar
On Dakota Matrix
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WebMineral
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Mindat
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Coloradoite

- tellurium ore - #47888
Locality
Perseverance Gold mine, Kalgoorlie-Boulder, Western Australia, Australia 
Formula
HgTe 
Availability
Sold
Size
4 x 2 x 2 cm - Miniature 
Tagged
ore specimen , tellurium  
Special Info
EDS Confirmed 

Great piece of tin-white to brilliant silver. EDS confirmed.


Coloradoite

Formula
HgTe 
Crystal System
Isometric 
Crystal Habit
Massive, Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
grayish black, black 
Streak
black 
Class
Isometric - Hextetrahedral 
Fracture
Conchoidal 
Hardness
2.5 
Special Info
EDS Confirmed

Copper

- copper ore - #58549
Locality
Keweenaw Co., Michigan, United States 
Formula
Cu 
Availability
Sold
Size
11 x 8 x 7 cm - Cabinet 
Tagged
ore specimen  

Large heavy mass of native Copper in Quartz. There are no real crystals, but rather casts of Copper molded by the granular Quartz.


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
Chris van Laer Collection
Mineralpedia
View Copper
On Dakota Matrix
Previously Sold Copper
On Dakota Matrix
Other Available Copper
WebMineral
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Mindat
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