Calcite

Typical Santa Eulalia matrix with heavy iron oxides formed the platform to host a full on druise of gemmy crystals of which a few continued to form 3-3.5cm gemmy wins. Idealized in presentation and sits perfectly on its own. I purchased it in 2006. Formerly in the Joe Kielbaso collection.

Locality: Santa Eulalia, Mun de Aquiles Serdan. Chihuahua, Mexico

Composition: calcium carbonate