8 Photos
Stromeyerite
Chemical Formula	CuAgS
Species	Sulfides
Crystal System	Orthorhombic
Mohs Scale	2-3
Specific Gravity	6.33
Color	Blue gray, dark blue, dark steel gray, or steel gray
Streak	Steel gray
Luster	Metallic
Diaphaneity	Opaque
Fracture	Sub-Conchoidal
Crystal Habit：Prismatic, massive, compact
Geological Setting：Hydrothermal veins (supergene enriched zone)

Stromeyerite is a sulfide mineral of copper and silver, with the chemical formula AgCuS. It forms opaque blue grey to dark blue orthorhombic crystals.

It was discovered in 1832 in Central Bohemia Region, Czech Republic, and named after the German chemist, Friedrich Stromeyer who performed the first analysis of the mineral.