Emerald - Wikipedia Emerald is a gemstone and a variety of the mineral beryl (Be 3 Al 2 (SiO 3) 6) colored green by trace amounts of chromium or sometimes vanadium [2] Beryl has a hardness of 7 5–8 on the Mohs scale [2]
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Emerald Gemstone | Emerald Stone – GIA Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine Gem experts differ on the degree of green that makes one stone an emerald and another stone a less-expensive green beryl
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Emerald: The Worlds Most Popular Green Gem, May Birthstone Emeralds are gem-quality specimens of the beryl mineral family with a rich, distinctly green color They are found in igneous, metamorphic, and sedimentary rocks in a small number of locations worldwide For over 5000 years, emeralds have been one of the most desirable and valuable colored stones
Emerald Group Publishing - Wikipedia Emerald was founded in the United Kingdom in 1967 as Management Consultants Bradford (MCB) UP Ltd The publisher changed its name to Emerald in 2002 following the success of its Emerald Fulltext database