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chalcodite

A monoclinic and triclinic mineral, K(Mg,Fe)8(Si,Al)12(O,OH)27(?) ; black to greenblack; in micalike plates, fibrous forms, and velvety bronze-colored incrustations.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 points
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