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