marmatite definition

  • noun:
    • A dark as a type of sphalerite that's abundant with metal
    • A ferruginous variety of shalerite or zinc blende, almost black in shade.
    • A variety of sphalerite or zinc sulphid, containing considerable metal, and hence of a black shade. The original, found at Marmato, near Popayan, in Colombia, contained 23 %. of sulphate of metal.

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