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They have the ability to purchase large amounts of rough and have wholesale and retail distribution networks in place to facilitate the sale of loose tanzanite and finished jewellery. In August 2013 TanzaniteOne [4] announced they had opened an online boutique, www.tananiteoneonline, which sold tanzanite gemstones and tanzanite set gold ...
The Diamond Trading Company (DTC) is the rough diamond sales and distribution arm of the De Beers Group. The DTC sorts, values and sells about 35% of the world’s rough diamonds by value. [ 1 ] The DTC has a combination of wholly owned and joint venture operations in South Africa (DBSSSA), Botswana (DTCB and DBGSS), and Namibia ( NDTC ).
Oscar Heyman & Brothers is a wholesale business, selling through retail stores. Oscar Heyman & Brothers produced jewelry for 20th century retailers such as Black, Starr & Frost , Udall & Ballou, Marcus & Co , J.E. Caldwell & Co, [ 14 ] Laykin et Cie, and Shreve, Crump & Low .
Once purchased by Sightholders (which is a trademark term referring to the companies that have a three-year supply contract with DTC), diamonds are cut and polished in preparation for sale as gemstones ('industrial' stones are regarded as a by-product of the gemstone market; they are used for abrasives). [106]
The company's first product was the Robogem, an automated device for gemstone processing, as part of an initiative promoted by the Israel Emerald Cutters Association. [ 11 ] In the early 1990s, the company released DiaMension®, [ 9 ] one of the world's first diamond cut grading software that could accurately measure a rough diamond's ...
In the wholesale trade of gem diamonds, carat is often used in denominating lots of diamonds for sale. For example, a buyer may place an order for 100 carats (20 g) of 0.5-carat (100 mg), D–F, VS2-SI1, excellent cut diamonds, indicating a wish to purchase 200 diamonds (100 carats (20 g) total mass) of those approximate characteristics.
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