Dyscrasite
Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
Mineral NameDyscrasite
Chemical FormulaAg₃Sb
Mohs Hardness3.5
Crystal Systemorthorhombic
Lustermetallic
Streak Colorblack to dark gray
Cleavagedistinct on {001}, poor on {010} and {110}
Fractureuneven to subconchoidal
Specific Gravity9.7
Colorssilver-white, tin-white, grayish, blackish
Transparencyopaque
Type LocalitySamson Mine, St Andreasberg, St Andreasberg District, Harz Mts, Lower Saxony, Germany
Mineral GroupSulfides and Sulfosalts (Antimonides)
Usescollector, minor ore of silver
Associated Mineralsarsenic, native silver, antimony, galena, sphalerite, calcite, quartz
Rarityuncommon
Description
This specimen features a dark, metallic mineral with a rough, granular to botryoidal texture, covered in small, sparkling silver-white to grayish crystals of Dyscrasite.
Geological Context
Dyscrasite is typically found in hydrothermal silver-antimony veins, often in low-temperature environments, associated with other silver and antimony-bearing minerals.
