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Learn about Gemstones Emerald Color: green Hardness: 7.5 – 8 Refractive Index: 1.57 – 1.59 Density: 2.67 – 2.75 Chemical Composition: Be3Al2(SiO3)6 Crystal Structure: hexagonal Origins: Columbia, Zambia, Brazil, Madagascar, Russia, India, Pakistan. Back

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