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Related to Bournonite: tetrahedrite, Tennantite, Boulangerite, cobaltite, Jamesonite, pyrargyrite, Violarite
|n.||1.||(Min.) A mineral of a steel-gray to black color and metallic luster, occurring crystallized, often in twin crystals shaped like cogwheels (wheel ore), also massive. It is a sulphide of antimony, lead, and copper.|