Calcite on Dolomite with Chalcopyrite

Doubly terminated glassy and clear yellow 2.7cm hexagonal crystal perched over one small sister crystal (cleaved on one end) on a dolomite coated piece of breccia with highly iridescent chalcopyrites and some massive pyrite. Ex Don and Kathy Hines collection.

Locality: Sweetwater Mine, Viburnum Trend, Reynolds County, Missouri

Composition: calcium carbonate