Cornwallite (uncommon CA locale) Trimingham Coll.

Murdock Mine, Last Chance Dist., Nevada Co., California
Small Cabinet, 8.4 x 5.3 x 2.9 cm
Start Time: 11/13/2013 6:30:00 pm (CST)
End Time: 11/21/2013 6:30:00 pm (CST)
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Item Description

Cornwallite is a rare Cu-arsenate, that is the arsenate analogue of pseudomalachite and the monoclinic dimorph of cornubite. A large crust of rich green botryoidal cornwallite covers the quartz matrix and there are scattered small patches of green-blue chrysocolla. Choice and rich material from this obscure California locale. Specimens are seldom available. Ex Bob Trimingham Collection.

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