$250.00 €212 £180.00 approx. This specimen is priced in US dollars, all other prices are approximate.
Spherical crystals of Chalcopyrite up to 1 cm in diameter form a mound of the variety Blister Copper from Tincroft mine in Illogan, a parish close to Redruth in Cornwall. The Blister Copper is overgrown by 1 to 3 mm slightly curved Chalcopyrite crystals and possibly some Siderite, all coated in a sooty black oxidation product. A rich representative specimen of Blister Copper from this most famous of mining districts.