osmiridium

Noun
  1. A hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum);
    Used in needles and pen nibs etc. (synset 114713139)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    same as: iridosmine

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