Calcite on Chrysocolla

This piece traces back to the Doug Tolland collection and features grey crystals nicely isolated and set off by rich blue chrysocolla. Unique in that a rhombohedron penetrates a modified rhombohedron with a trigonal prism below. Reactive to LW as bright orange. No damage. Ex Kenny Gay collection.

Locality: Poor Man Fault, Ray Mine, Pinal County, Arizona

Composition: calcium carbonate