How do I identify Bismutite?

Bismutite can be identified by its hardness of 2.5 - 3.5 on the Mohs scale, Yellow to brown color. Look for these key characteristics when examining specimens.

What color is Bismutite?

Bismutite typically appears in Yellow to brown, greenish, green-grey, grey or black; colourless or tinted in shades of faint yellow, green, etc. in transmitted light.. Color can vary depending on impurities and formation conditions.

How hard is Bismutite?

Bismutite has a hardness of 2.5 - 3.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.

How to Identify Bismutite | Properties, Meaning & Uses

What is Bismutite?

Bismutite or bismuthite is a bismuth carbonate mineral with formula Bi2(CO3)O2 (bismuth subcarbonate). Bismutite occurs as an oxidation product of other bismuth minerals such as bismuthinite and native bismuth in hydrothermal veins and pegmatites. It crystallizes in the orthorhombic system and typically occurs as earthy to fibrous masses. It was first described in 1841 for an occurrence in Saxony. The term bismuthite has been used in the past for bismuthinite.

Bismutite Market Value Calculator

Estimate the market value of Bismutite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Bismutite Localities Map

See where Bismutite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

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North ZoneCentral RidgeSouth Basin

Quick Facts

Physical Properties

Color: Yellow to brown, greenish, green-grey, grey or black; colourless or tinted in shades of faint yellow, green, etc. in transmitted light.
Hardness (Mohs): 2.5 - 3.5
Density: 8.15 g/cm³
Streak: Grey