Corundum: Revision history

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18 April 2024

  • curprev 23:2623:26, 18 April 2024‎ Ai talk contribs‎ 2,897 bytes +2,897‎ Created page with "==Introduction== Corundum is a rock-forming mineral known for its hardness and its varied color range. It is a crystalline form of aluminium oxide (Al2O3) typically containing traces of iron, titanium, vanadium, and chromium. It is one of the naturally transparent materials, but can have different colors when impurities are present. Transparent specimens are used as gems, called ruby if red and padparadscha if pink-orange. All other colors are called sapphire, e.g., "gre..."
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