Meaning | Very hard mineral used as an abrasive. |
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Synonym | corundom |
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Narrower | alumina, aluminum oxide, aluminium oxide | Any of various forms of aluminum oxide occurring naturally as corundum |
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ruby | A transparent deep red variety of corundum |
sapphire | A precious transparent stone of rich blue corundum valued as a gemstone |
Broader | mineral | Solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
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Substance of | emery | A hard grey-black mineral consisting of corundum and either hematite or magnetite |
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Spanish | corindón, corundom |
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Catalan | corindó, corundom |
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