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  2. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    Now popular in engagement rings, this usage dates back to the marriage of Maximilian I to Mary of Burgundy in 1477. [17] A popular style is the diamond solitaire, which features a single large diamond mounted prominently. [18] Within solitaire, there are three categories in which a ring can be classified: prong, bezel and tension setting. [19]

  3. Hardnesses of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Hardnesses_of_the_elements...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  4. Diamond - Wikipedia

    en.wikipedia.org/wiki/Diamond

    In 2008, the Wittelsbach Diamond, a 35.56-carat (7.112 g) blue diamond once belonging to the King of Spain, fetched over US$24 million at a Christie's auction. [58] In May 2009, a 7.03-carat (1.406 g) blue diamond fetched the highest price per carat ever paid for a diamond when it was sold at auction for 10.5 million Swiss francs (6.97 million ...

  5. Diamonds as an investment - Wikipedia

    en.wikipedia.org/wiki/Diamonds_as_an_investment

    There are considerable price shifts near the edges of the size bands, so a 0.49 carats (98 mg) stone may list at $5,500 per carat = $2,695, while a 0.50 carats (100 mg) stone of similar quality lists at $7,500 per carat = $3,750. Stones near the top of a size band (or rarer fancy coloured varieties) tend to be uprated slightly.

  6. Diamond color - Wikipedia

    en.wikipedia.org/wiki/Diamond_color

    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] It is the largest fancy vivid blue diamond classified by the Gemological Institute of America ever sold at auction; it sold at Christie's in Geneva in May 2016 for US$50.6 million.

  7. Material properties of diamond - Wikipedia

    en.wikipedia.org/wiki/Material_properties_of_diamond

    General; Category: Native Nonmetal, Mineral Formula (repeating unit) Carbon (C) Crystal system: Diamond cubic (a = 3.56683 Å)Identification; Color: Most often colorless to yellow or brown; rarely pink, orange, green, blue, gray, or red

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