Home > American Minerals – January 11 > MS2001 Chalcoalumite with Azurite

Chalcoalumite with Azurite

Chalcoalumite is a hydrous sulfate of copper and aluminum. Larsen & Vassar (1925) named chalcoalumite after its chemistry, using the Greek root chalco for copper. Chalcoalumite often covers brilliant azurite druses at Bisbee; in many cases, chalcoalumite is removed to reveal darker blue azurite underneath.

This is a nice example of the chalcoalumite in undulating pale blue botryoids. The mineral has dehydrated a bit in air, and is somewhat chalky. Nevertheless, the specimen is solid and stable. One side of the specimen consists of rich blue azurite druses.

Price: $150

Item code: MS2001

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