corundum, naturally occurring aluminum oxide mineral (Al2O3) 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.). Corundum in its pure state is colourless, but the presence of small amounts of impurities can impart a broad range of hues to the mineral. Ruby owes its red colour to chromium, sapphire its blue shades to the presence of iron and titanium; most corundum contains nearly 1 percent iron oxide. The mineral readily weathers to other aluminous minerals—e.g., margarite, zoisite,
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Corundum is used as a gemstone, abrasive, refractory and much more. Red corundum is a ruby, blue is a sapphire, any other color is a fancy sapphire. Synthetic corundum is used instead of natural corundum in most applications.
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Corundum is used as a gemstone, abrasive, refractory and much more. Red corundum is a ruby, blue is a sapphire, any other color is a fancy sapphire. Synthetic corundum is used instead of natural corundum in most applications.
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Corundum is used as a gemstone, abrasive, refractory and much more. Red corundum is a ruby, blue is a sapphire, any other color is a fancy sapphire. Synthetic corundum is used instead of natural corundum in most applications.
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Corundum is used as a gemstone, abrasive, refractory and much more. Red corundum is a ruby, blue is a sapphire, any other color is a fancy sapphire. Synthetic corundum is used instead of natural corundum in most applications.
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Corundum is a crystalline form of aluminum oxide (Al2O3) with traces of iron, titanium and chromium. It is a rock-forming mineral. It is one of the
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Corundum is a crystalline form of aluminum oxide (Al2O3) with traces of iron, titanium and chromium. It is a rock-forming mineral. It is one of the
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Corundum is a crystalline form of aluminum oxide (Al2O3) with traces of iron, titanium and chromium. It is a rock-forming mineral. It is one of the
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Corundum is a crystalline form of aluminum oxide (Al2O3) with traces of iron, titanium and chromium. It is a rock-forming mineral. It is one of the
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Corundum is the hardest mineral after diamond on Earth. The name comes from the Sanskrit kuruvinda, meaning “ruby” the name given to red corundum.
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Corundum is the hardest mineral after diamond on Earth. The name comes from the Sanskrit kuruvinda, meaning “ruby” the name given to red corundum.
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Corundum is the hardest mineral after diamond on Earth. The name comes from the Sanskrit kuruvinda, meaning “ruby” the name given to red corundum.
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Corundum is the hardest mineral after diamond on Earth. The name comes from the Sanskrit kuruvinda, meaning “ruby” the name given to red corundum.
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Learn about corundum topic of Geography in details explained by subject experts on vedantu.com. Register free for online tutoring session to clear your doubts.
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Everything you ever wanted to know about corundum. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.
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Everything you ever wanted to know about corundum. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.
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Everything you ever wanted to know about corundum. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.
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Everything you ever wanted to know about corundum. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.
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Corundum is a rock-forming mineral that is found in igneous, metamorphic, and sedimentary rocks.
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Back to Rocks and Minerals Articles Kathy Feick Corundum Al2O3 Corundum is a very hard, tough and stable mineral. For all practical purposes, it is the hardest mineral, second only to diamond. It is unaffected by acids and most environments. The name corundum was first derived either from the Sanskrit word Kuirvinda or from the Indian name for corundum, Kauruntoka. Formation:
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Detailed description, properties, and locality information guide about the mineral corundum: ruby and sapphire.
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a very hard mineral that consists of aluminum oxide occurring in massive and crystalline forms, that can be synthesized, and that is used for gemstones (such as ruby and sapphire) and as an abrasive… See the full definition
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Corundum Definition Corundum is an extremely hard mineral occurring in many colors, either as shapeless grains or as rhombohedral crystals. It also occurs
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