Sphalerite
ZnS
Shiraita Mine, Niigata pref., Japan
新潟県魚沼郡入広瀬村大白川白板鉱山

A specimen of gemmy translucent yellow to darker opaque well-formed octahedral crystals of Sphalerite. The crystals have a metallic to resinous lustre, and exhibit stepped triangular growth detail on the crystal faces. The Sphalerite crystals sit in a bed of small prismatic Quartz crystals on a brecciated matrix.