Calcite, Sphalerite, Chalcopyrite

Unknown Owner

Help improve this recordNo owner is registered for this specimen yet. If it's yours or you know more about it, you can add the owner, provenance, publications and other details.

A very old, very rare calcite crystal with sparkly, powder-blue copper mineral inclusions from the Mid-Continent Mine of Kansas. The sharply terminated, lustrous, translucent, amber crystal scalenohedron aesthetically rests on sphalerite with chalcopyrite. The copper mineralization, as malachite or chrysocolla, formed as the chalcopyrite weathered and as the calcite crystal was growing. This is a unique, rare old-time specimen, certainly from prior to World War I. Ex. Mullane Collection.