jamesonite definition

  • noun:
    • A dark grey monoclinic sulfosalt mineral with chemical formula Pb4FeSb6S14.
    • A steel-gray mineral, of metallic luster, commonly fibrous massive. It is a sulphide of antimony and lead, with some iron.
    • A native sulphid of antimony and lead, commonly occurring in fibrous masses, sometimes in capillary types (feather-ore). This has a lead-gray shade and metallic luster.
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