corundum the mineral corundum

corundum the mineral corundum

  • Corundum The mineral Corundum Sapphire Ruby info

    Corundum is best known for its gem varieties Ruby and Sapphire. Ruby and Sapphire are scientifically the same mineral but just differ in color.

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  • Corundum Use as a Gemstone Abrasive Refractory

    What is Corundum? Corundum is a rockforming mineral that is found in igneous metamorphic and sedimentary rocks. It is an aluminum oxide with a chemical composition of

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  • Corundum

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  • Corundum mineral Britannica

    Corundum naturally occurring aluminum oxide mineral (Al 2 O 3) that is after diamond the hardest known natural substance. Its finer varieties are the gemstones sapphire and ruby (qq.v.) and its mixtures with iron oxides and other minerals are called emery (q.v.).

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  • Corundum Minerals Education Coalition

    Corundum. Corundum is a crystalline form of aluminum oxide (Al2O3) with traces of iron titanium and chromium. It is a rockforming mineral. It is one of the naturally transparent materials but can have different colors when impurities are present.

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  • Corundum Mineral information data and localities.

    Named "corinvindum" in 1725 by John Woodward and derived from the Sanskrit kuruvinda ("Ruby"). Richard Kirwan used the current spelling "corundum" in 1794.

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