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corundum
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The answer CORUNDUM has 12 possible clue(s) in existing crosswords.
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The word CORUNDUM is VALID in some board games. Check CORUNDUM in word games in Scrabble, Words With Friends, see scores, anagrams etc.
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Definitions of corundum in various dictionaries:
noun - very hard mineral used as an abrasive
noun - a hard mineral
CORUNDUM - Corundum is a crystalline form of aluminium oxide (Al2O3) typically containing traces of iron, titanium, vanadium and chromium. It is a rock-forming ...
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| Rubies are a form of this stone, the hardest in the world after diamond |
| AKA aluminum oxide, it's used as an abrasive |
| Possible Dictionary Clues |
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| An extremely hard mineral, aluminum oxide, Al2O3, sometimes containing iron, magnesia, or silica, that occurs in gem varieties such as ruby and sapphire and in a common black, brown, or blue form used chiefly in abrasives. |
| extremely hard crystallized alumina, used as an abrasive. Ruby and sapphire are varieties of corundum. |
| very hard mineral used as an abrasive |
| Extremely hard crystallized alumina, used as an abrasive. Ruby and sapphire are varieties of corundum. |
| Corundum description |
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Corundum is a crystalline form of aluminium oxide (Al2O3) typically containing traces of iron, titanium, vanadium and chromium. It is a rock-forming mineral. It is a naturally transparent material, but can have different colors when impurities are present. These impurities are the presence of transition metals in the crystal structure of corundum. Corundum has two primary gem varieties, ruby and sapphire. Rubies are red due to the presence of chromium, and sapphires exhibit a range of colors depending on what transition metal is present. A rare type of sapphire, padparadscha sapphire, is pink-orange. * The name "corundum" is derived from the Tamil word Kurundam, or the Sanskrit word Kuruvinda.Because of corundum's hardness (pure corundum is defined to have 9.0 on the Mohs scale), it can scratch almost every other mineral. It is commonly used as an abrasive on everything from sandpaper to large machines used in machining metals, plastics, and wood. Some emery is a mix of corundum and ot |