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Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of chromium or sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds have much material trapped inside during the gem's formation,... Wikipedia
Associated month: May
Color: Green
Hardness (Mohs hardness scale): 7.5 – 8
Chemical formula: Be₃Al₂SiO₆
Density: 2.67 to 2.78
Birefringence: δ = 0.0040–0.0070
Category: Beryl variety
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Apr 22, 2024 · Highly valued as gemstones, emeralds are a grass-green variety of beryl. The capacity of emeralds to deflect light and to break white light ...