Fluorite with Strontianite and Calcite

When you get to these smaller sized specimens they are usually a few crystals. This piece has SUPER glassy crystals to 7mm, and if were not for the light purple color they would be nearly invisible. The only contact area is the bottom of the specimen. The back is coated with radial aggregates of tiny acicular strontianites and small yellow calcites. A great addition to an SI suite.

Locality: Minerva #1 Mine, Cave in Rock, Illinois

Composition: calcium fluoride