Bournonite

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Bournonite or 'cog-wheel ore' comprises of (copper lead antimony sulphide). Cog wheel ore contains the mineral chromite, though it is difficult to extract from crystals.

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Photo credit: © Natural History Museum, London / Alamy / Afripics
License: Licensed
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Keywords: antimony, bournonite, copper, lead, lustrous, metal, metallic, mineral, native, ore, rock, shot, studio, studioshot, sulfide, sulfosalt, sulphide, wheel