Calcite

A lovely piece of deep amber bisecting scalenohedral calcites on a   shard of host rock. Ross Lilly label states it is from pillar robbing in 1987. The main crystal is doubly terminated but the bottom termination on one side is interference. The top termination has a really small flea bite. The second crystal does have a cleaved tip on the underside back, which does not show when displayed. Ex Jim and Paula Wilson.

Locality: Sub-Rosiclare Horizon, North End, Denton Mine, Southern Illinois

Composition: calcium carbonate on calcium fluoride