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Key terms: emerald hue color oil green natural beryl graded synthetic cut mineral gemstone trade clarity crystal referred product producer rare none growth grown scale inclusions treatment colombia mining normal esmeralda austria gallery treated hydrothermal pakistan precious chemical hardness enhancement astrology green hue synthesis laboratory saturation conditions synthetic emeralds gemological emerald city colorless beryl national museum of natural history museum of natural history emeralds Search external links cited by footnotes on Wikipedia page Emerald: |
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