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Chalcocite with Chalcopyrite, Tincroft Mine, Illogan, Cornwall, England
Royal Cornwall Museum Photo Prints and Wall Art
Chalcocite with Chalcopyrite, Tincroft Mine, Illogan, Cornwall, England
Steel coloured crystals of chalcocite covering chalcopyrite. This botryoidal variety of chalcopyrite is known as blister copper. The specimen was drawn for Specimens of British Minerals, Selected from the Cabinet of Philip Rashleigh (1797, Volume 1, Plate 9, Figure 4) which states Is yellow mammillary copper ore, covered with a thin coat of a bluish-green colour, with crystals of steel-coloured copper ore, composed of prisms having six sides, and truncated ends, formed upon the mammillary copper ore. d One of the steel-coloured crystals magnified. From Tincroft. Chalcocite is a secondary mineral occurring in or near the oxidised zone of copper sulfide deposits. Rashleigh Collection
TRURI : 1903.1.826
Media ID 19171541
© RIC, photographer A.G. Tindle
Black Blue Copper Geology Gray Grey Iron Metal Metallic Mine Mineral Mining Secondary Specimen Sulfide Sulphide Yellow
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