mineral
Bismuthinite with Chalcopyrite and Quartz
Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)
Hardness of 2 for bismuthinite and 3.5-4 for chalcopyrite on the Mohs scale; metallic luster; lead-gray to silver-white color for bismuthinite with brass-yellow chalcopyrite and brownish-red matrix; opaque; specific gravity around 6.8 to 7.2.
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Physical properties
Hardness of 2 for bismuthinite and 3.5-4 for chalcopyrite on the Mohs scale; metallic luster; lead-gray to silver-white color for bismuthinite with brass-yellow chalcopyrite and brownish-red matrix; opaque; specific gravity around 6.8 to 7.2.
Formation & geological history
Formed primarily in hydrothermal vein systems associated with granitic magmatism and high-temperature metamorphic environments.
Uses & applications
Used as an ore of bismuth and copper, and valued as a mineral specimen for collectors.
Geological facts
Bismuthinite is the primary ore mineral for the element bismuth, which has unique properties such as expanding upon freezing and low toxicity compared to other heavy metals.
Field identification & locations
Identified by its heavy weight, metallic gray color, and association with other sulfide minerals like chalcopyrite. Found in various hydrothermal deposit locations worldwide.
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