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ruby |
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rubyRed transparent gem variety of the mineral corundum Al2O3, aluminium oxide. Small amounts of chromium oxide, Cr2O3, substituting for aluminium oxide, give ruby its colour. Natural rubies are found mainly in Myanmar (Burma), but rubies can also be produced artificially and such synthetic stones are used in lasers. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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