melaconite definition

  • noun:
    • An earthy black oxide of copper, due to the decomposition of various other ores.
    • An earthy black colored oxide of copper, due to the decomposition of various other ores.
    • A black or grayish-black, impure, earthy (also crystallized) oxid of copper, within Vesuvian lava (there called tenorite) and abundantly at Keweenaw Point, Lake better. Within the second instance this is the outcome of the decomposition of various other ores.
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