Calcite

The Shimen is a realgar mine with a carbonate hosted arsenic deposit. This specimen is a gem in all regards. It is multiply twinned and the terminations are knife edge. There is a tiny flea bite on one and the side car crystal has a cleaved tip. Clarity makes the crystals in the photos difficult to delineate. Super piece. Ex Stephen Gerome.

Locality: Shimen Mine, Changde Prefecture, Hunan Province, China

Composition: calcium carbonate