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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] Most emeralds have many inclusions, [3] so their toughness (resistance to breakage) is classified as generally poor.
Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including (clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...
Sapphire is one of the two gem-varieties of corundum, the other being ruby (defined as corundum in a shade of red). Although blue is the best-known sapphire color, it occurs in other colors, including gray and black, and also can be colorless. A pinkish orange variety of sapphire is called padparadscha.
According to a report from the Gem & Jewellery Export Promotional Council, synthetic diamonds accounted for 0.28% of diamond produced for use as gemstones in 2014. [122] In April 2022, CNN Business [ 123 ] reported that engagement rings featuring a synthetic or a lab grown diamond jumped 63% compared to previous year, while the number of ...
United Arab Emirates. GEMS Education was founded in Dubai, and its first school there, Our Own English High School, originally opened in 1968. The company still has its strongest presence in Dubai and in the United Arab Emirates. GEMS is the largest education provider in the UAE, and the UAE accounts for more than 90% of its business.
Download as PDF; Printable version; In other projects ... This is a list of gemstones, ... There are a number of organic materials used as gems, including: Amber ...
Gemporia US (formerly known as Rocks TV) is a former American reverse auction jewellery shopping channel which formerly was carried on American cable and satellite providers. The channel was launched on July 12, 2012, as Rocks TV, and operated from the United Kingdom from Gemporia's studios in Redditch, sharing Gems TV personnel.
Golconda diamonds are mined in the Godavari-Krishna delta region of Andhra Pradesh, India. Golconda Fort in the western part of modern-day Hyderabad was a seat of the Golconda Sultanate and became an important centre for diamond enhancement, lapidary, and trading. Golconda diamonds are graded as Type IIa, are formed of pure carbon, are devoid ...