Chalcoalumite, Azurite

Unknown Owner

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A fine, old-time, cabinet specimen from the Copper Queen Mine at Bisbee. Two grottos or caves and a nearby wall on the sturdy gossan matrix are lined with sparkly, tiny, electric-blue to royal-blue azurite crystals. The starkly contrasting "grass" in the "front yard" is botryoidal, pastel-green chalcoalumite. Chalcoalumite is a rare copper, aluminum sulfate and the Copper Queen Mine is the Type Locality. This is undoubtedly old material, dating from the late 1800s-early 1900s, but no proof. Ex. Dennis Mullane Collection.