Quartz

Unknown Owner

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These specimens have been labeled as being Quartz after Baryte pseudomorphs, but given the fact that Baryte is chemically inert and nearly impossible to dissolve, it is most likely that these pseudomorphs or "casts" are actually Quartz replacing Anhydrite. With that said, this specimen is a beautiful pseudomorph/cast consisting of hollow and blocky cavities of Quartz replacing the original mineral. The most attractive aspect of this specimen is the fact that the Quartz crystals are not microscopic or massive, but many of them are easily visible with the naked eye, and show absolutely water-clear transparency. A wonderful specimen from a district that produced some of the most classic "casts" from all of Colorado. Ex. Richard Kosnar Collection.