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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.

SOLD

Chalcocite

with Chalcopyrite - copper ore - #58564

Details
Data
Provenance
Resources

Locality: Ferris-Haggarty mine, Encampment dist., Carbon Co., Wyoming, United States
Formula: Cu₂S
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: Cu₂S
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

Mineralpedia: View Chalcocite
On Dakota Matrix: Previously Sold Chalcocite
On Dakota Matrix: Other Available Chalcocite
WebMineral: View Chalcocite
Mindat: View Chalcocite

SOLD

Chalcopyrite

- copper ore - #49105

Details
Data
Provenance
Resources

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

Mineralpedia: View Chalcopyrite
On Dakota Matrix: Previously Sold Chalcopyrite
On Dakota Matrix: Other Available Chalcopyrite
WebMineral: View Chalcopyrite
Mindat: View Chalcopyrite

SOLD

Chromite

- chromium ore - #BW58130

Details
Data
Provenance
Resources

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.