Chalcopyrite var. Blister Copper

$250.00

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Tucson, Arizona, USA

7,543 for sale·132 sold

Spherical crystals of Chalcopyrite up to 1 cm in diameter form a mound of Blister Copper from Tincroft mine in Illogan, a parish between Camborne and Redruth in Cornwall. The Blister Copper, a botryoidal variety of Chalcopyrite, is overgrown by 1 to 3 mm, slightly curved Chalcopyrite crystals and possibly some Siderite, all coated in a sooty black oxidation product. This is a rich representative specimen of Blister Copper from this most famous locality, once the very heart of the Cornish metalliferous mining industry.\n