Calcite on Quartz

Idarado quartz is fairly easy to identify. The cloudy striations span the full growth of the crystal and the sharp trigonal termination gives it away. Half the specimen is populated by chocolate scalenohedrons of calcite. The Carter Rich label notes the specimen is circa 1974. Classic Idarado material. Ex Jim and Paula Wilson.

Locality: Idarado Mine, Ouray, Colorado

Composition: silicon dioxide and calcium carbonate