This Specimen has been sold.
3.1" Sphalerite With Quartz & Pyrite - Peru
This is a specimen of shiny, dark grey Sphalerite associated with small, clear quartz crystals and pyrite from the Huanzala Mine in Peru. The entire piece measures 3.1" wide and comes with a display stand.
Sphalerite is a part of the sulfides group and typically exhibits a grey/black appearance due to high concentrations of impurities. When sphalerite is in it's purest state, the chemical composition is ZnS, and can display a gemmy transparent light tan/yellow color. This is one of the few minerals that can form crystals ranging anywhere between gemmy and transparent to opaque and metallic-like. Opaque or cloudy sphalerite tends to be most abundant, due to the ease of iron replacing zinc in the process of formation.