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  2. Move over diamonds, these little-known gemstones are heating up

    www.aol.com/move-over-diamonds-little-known...

    In 2016, jeweler Olivia Young of Ouroboros sold a red spinel ring for £6,000 ($7,700). Last year, the client’s insurance company paid out £30,000 ($38,400) to replace it.

  3. Diamond (gemstone) - Wikipedia

    en.wikipedia.org/wiki/Diamond_(gemstone)

    Since the per carat price of diamond shifts around key milestones (such as 1.00 carat (200 mg)), many one-carat diamonds are the result of compromising cut for carat. Some jewelry experts advise consumers to buy a 0.99-carat (198 mg) diamond for its better price or buy a 1.10-carat (220 mg) diamond for its better cut, avoiding a 1.00-carat (200 ...

  4. Red beryl - Wikipedia

    en.wikipedia.org/wiki/Red_beryl

    The Utah Geological Survey estimated that one red beryl is found for every 150,000 diamonds. [1] According to Gemmological Association of Great Britain a 2 carat red beryl is as rare as a 40 carat diamond. [13] Red beryl is valued roughly the same price or higher than emerald [12] despite being a hundred times rarer. Its rarity has made it less ...

  5. Diamond color - Wikipedia

    en.wikipedia.org/wiki/Diamond_color

    This record was broken in 2013 when an orange diamond sold for US$35 million or US$2.4 million per carat. [18] It was again broken in 2016 when the Oppenheimer Blue, a 14.62-carat (2.924 g) vivid blue diamond became the most expensive jewel ever sold at an auction. [19]

  6. Spinel - Wikipedia

    en.wikipedia.org/wiki/Spinel

    It is widely used as an inexpensive cut gem in birthstone jewelry for the month of August. Light blue synthetic spinel is a good imitation of aquamarine beryl, and green synthetic spinel is used as an emerald or tourmaline simulant. [29] By 2015, transparent spinel was being made in sheets and other shapes through sintering. [30]

  7. Star of South Africa (diamond) - Wikipedia

    en.wikipedia.org/wiki/Star_of_South_Africa_(Diamond)

    The Star of South Africa, also known as the Dudley Diamond, is a 47.69-carat (9.538 g) white diamond found by a Griqua shepherd in 1869 on the banks of the Orange River. The original stone, before cutting, weighed 83.5 carats (16.70 g). [ 1 ]

  8. Petra Diamonds - Wikipedia

    en.wikipedia.org/wiki/Petra_Diamonds

    The Cullinan mine continues to produce large stones. The Cullinan Heritage, a 507-carat (101.4 g) white diamond, was discovered in September 2009. This stone was the 19th biggest uncut diamond ever found and was sold in February 2010 to Chow Tai Fook Jewellery for $35.5m, the highest price ever paid for an uncut diamond. [10]

  9. Graff (jewellers) - Wikipedia

    en.wikipedia.org/wiki/Graff_(jewellers)

    The Paragon diamond was acquired by Graff in 1989. The Paragon is a 7-sided diamond of 137.82 carats (27.564 g), cut, [13] [14] and was worn as part of "millennium" necklace of round, pink, blue and yellow diamonds by Naomi Campbell in 1999. [15] The Lesotho Promise was acquired as a rough 603-carat (120.6 g) stone for $12.4 million in 2006. [16]

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