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RM1366   Chalcopyrite with siderite

Carn Brea and Tincroft United Mine, Carn Brea, Camborne-Redruth-St Day, Cornwall, United Kingdom

Brilliant group of chalcopyrite crystals, twinned and with complex forms, but with well defined faces and edges. The golden color, with iridescence, indicates that it is a "old" specimen. The piece comes from an interesting and classic English locality where few chalcopyrite specimens are known with this quality. These specimens were obtained at the beginning of XX century, it is a very "old" mineralogical sample from Clemens A. Winkler, german chemist who discovered the Germanium.

Size: 6.0 x 3.8 x 3.6 cm.
Main crystal: 8 x 8 mm.
Found in ±1900.

Excol. Clemens A. Winkler (1838-1904).