haematite

Noun
  1. The principal form of iron ore;
    Consists of ferric oxide in crystalline form;
    Occurs in a red earthy form (synset 114929871)
    is a type of: iron ore - an ore from which iron can be extracted
    substance meronym: emery - a hard grey-black mineral consisting of corundum and either hematite or magnetite; used as an abrasive (especially as a coating on paper)
    same as: hematite

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