argentopyrite

Sternbergite

Formula: AgFe2S3
Sulphide, dimorph of argentopyrite
Specific gravity: 4.101 to 4.215
Hardness: 1 to 1½
Streak: Black
Colour: Golden brown, tarnishes violet-blue
Solubility:
Environments:

Hydrothermal environments

Sternbergite is a secondary silver sulphosalt that occurs in hydrothermal veins in silver-bearing ore deposits (Webmin, HOM). Associated minerals include stephanite, acanthite, proustite, pyrargyrite, argentopyrite, xanthoconite, pyrite, galena, sphalerite, dolomite, calcite and quartz (HOM).

The type locality is Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic.

Back to Minerals