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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 ]
Red beryl, formerly known as bixbite and marketed as red emerald or scarlet emerald, is an extremely rare variety of beryl as well as one of the rarest minerals on Earth. [1] [2]: 19 The gem gets its red color from manganese ions embedded inside of beryllium aluminium cyclosilicate crystals. [1]
Duke of Devonshire Emerald – this emerald was named after the sixth Duke of Devonshire. This precious gem can now be viewed in a vault at the Natural History Museum in London. [4] Patricia Emerald – this 630-carat, di-hexagonal cut was first discovered in 1920. It is named after the mine owner's daughter, Patricia.
Emerald is a rare and valuable gemstone and, as such, it has provided the incentive for developing synthetic emeralds. Both hydrothermal [37] and flux-growth synthetics have been produced. The first commercially successful emerald synthesis process was that of Carroll Chatham. [38]
The Bahia Emerald is not a single gem but consists of nine dazzling crystals encased in a rough black rock 30 inches wide and 33 inches high. ... When asked where his bill of sale was, Thomas said ...
Gemfields Group Ltd (formerly Pallinghurst Resources Limited) is a British mining company incorporated in Guernsey and headquartered in London, United Kingdom, and is a supplier of coloured gemstones. [5] The company specializes in the mining, processing and sale of coloured gemstones, in particular emeralds and rubies. The group sells rough ...