| NOUN | substance | haematite, hematite | the principal form of iron ore |
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| Meaning | The principal form of iron ore; consists of ferric oxide in crystalline form; occurs in a red earthy form. | |
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| Synonym | hematite | |
| Broader | iron ore | An ore from which iron can be extracted |
| Substance of | emery | A hard grey-black mineral consisting of corundum and either hematite or magnetite |