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Key terms: rubies color hues heat gemstone synthetic rubies diamond purple rubin inclusions transparency pink silk mineral corundum myanmar sapphire hardness rutile laser been found finest spinel rough chromium heating process maiman imperfections improves fractures burma imitation violet cr spectral hues fusing carat mined secondary hues measuring premium theodore emission impurities red color verneuil national museum of natural history filling natural rubies powder Search external links cited by footnotes on Wikipedia page Ruby: |
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