Calcite

A series of elongated rhombohedral crystals reaching nearly 4cm on  a thin shard of host rock. None of the major crystals has any imperfections. A much less commonly seen habit from this locality. Fluoresces strong white under LW( most from the area fluoresce bright orange). A real find for the calcite collector! Ex Mike Wheat collection.

Locality: Irai, Alto Uruguai Region, Rio Grande do Sul, Brazil

Composition: calcium carbonate