Home > Copper Minerals II – September 8 > MS1105 Malachite on Cuprite

Malachite on Cuprite


Cuprite is an isometric oxide of copper, containing Cu1+ ions. At the surface of the Earth, Cu1+ is less stable than Cu2+, so cuprite often alters on its surface to various Cu2+ minerals, in this case malachite. These crystals are not complete pseudomorphs, since the malachite coating is relatively thin. How thin is the coating? Hard to say without damaging the specimen. This is a hoppered octahedron, 1.2 cm on edge, with minor adhering clay. A classic European mineral specimen!

This specimen was part of the personal collection of Ralph Merrill, proprietor of the prolific mail order business Minerals Unlimited. Merrill obtained this specimen from Burminco, Charles Burnham's former mineral company in east Los Angeles. Merrill's collection card and label ship with the specimen.

Price: $120

Item code: MS1105

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