Calcite w/ Copper minerals (circa 1950s) ex Mullane Coll.

Item Description

A very old, very rare, calcite crystal with sparkly, powder-blue copper mineral inclusions from the famous 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. The back end of the calcite is broken, but so what. This is a unique, rare old-timer, certainly from prior to World War I. Ex Mullane Collection.