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 many inclusions, so their toughness is classified as... Wikipedia
Associated month: May
Color: Green
Hardness (Mohs hardness scale): 7.5 – 8
Density: 2.67-2.78
Birefringence: δ = 0.0040–0.0070
Category: Beryl variety
Cleavage: Imperfect on the
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Emerald: the springtime gem. The vibrant green of emerald symbolizes renewal and fresh beginnings. It's the perfect birthstone for May. ... Emerald is one of the ...