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