Keyite, Zincolivenite
Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
7.7 x 5.2 x 4.3 cm. This is a wonderful rarity, as is any piece of the copper zinc cadmium arsenate, keyite named for the famous mineral dealer, Charlie Key. The piece is has blue/teal microcrystalline areas of keyite associated with minor cuprian adamite on chalcocite matrix. Keyite, as you can imagine, is quite rare, and only known to occur here ...
© Rob Lavinsky & irocks.com