bournonite definition

  • noun:
    • A sulfosalt mineral, a sulfantimonite of lead and copper.
    • A mineral of a steel-gray to black shade and metallic luster, occurring crystallized, often in twin crystals formed like cogwheels (wheel ore), also massive. It really is a sulphide of antimony, lead, and copper.
    • A sulphid of antimony, lead, and copper, of a steel-gray color and brilliant metallic luster, based in the Harz hills, Cornwall, and Mexico.

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