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Sapphire
Sapphire is the gem variety of corundum, aluminium oxide, and the hardest natural mineral after diamond. Trace elements colour it: iron and titanium together give blue, chromium gives ruby red and pink sapphire pink, and every colour of corundum except red is …
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Sapphire
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Star of India
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Logan Sapphire
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Pavo cristatus
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Montana
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Sapphire
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Corundum
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Padparadscha
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Kashmir
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Star of India
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Logan Sapphire
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Bismarck Sapphire
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SapphireSapphire is the gem variety of corundum, aluminium oxide, and the hardest natural mineral after diamond. Trace elements colour it: iron and titanium together give blue, chromium gives ruby red and pink sapphire pink, and every colour of corundum except red is …