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  2. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    In modern use, the precious stones are emerald, ruby, sapphire and diamond, with all other gemstones being semi-precious. [9] This distinction reflects the rarity of the respective stones in ancient times, as well as their quality: all are translucent , with fine color in their purest forms (except for the colorless diamond), and very hard with ...

  3. Worthy.com - Wikipedia

    en.wikipedia.org/wiki/Worthy.com

    Worthy.com offers an online auction platform for selling pre-owned diamond jewelry, loose diamonds, and luxury watches. The company first identifies the market value of the item through an automatic pricing engine and then agrees on a reserve price with the sellers.

  4. List of sapphires by size - Wikipedia

    en.wikipedia.org/wiki/List_of_sapphires_by_size

    Pink colored corundum may be either classified as ruby or sapphire depending on locale. Commonly, natural sapphires are cut and polished into gemstones and worn in jewelry. They also may be created synthetically in laboratories for industrial or decorative purposes in large crystal boules.

  5. Gemporia - Wikipedia

    en.wikipedia.org/wiki/Gemporia

    Gem Collector was launched on 8 October 2010. The channel shared the same studio as Jewellery Maker and broadcast live reverse auctions of loose gemstones between 7pm and 12am daily. Like Jewellery Maker, it was the first channel of its kind in the UK.

  6. Diamond - Wikipedia

    en.wikipedia.org/wiki/Diamond

    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]

  7. List of diamonds - Wikipedia

    en.wikipedia.org/wiki/List_of_diamonds

    24.78-carat (4.956 g) A 24.78-carat Fancy Intense Pink diamond and, until the sale of the Sweet Josephine diamond in November 2015, it was the most expensive jewel ever sold at auction. Previously owned by Harry Winston and an unnamed private collector, and bought by Laurence Graff (November 2010). [31] —

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