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  2. 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 ...

  3. Diamond color - Wikipedia

    en.wikipedia.org/wiki/Diamond_color

    Fancy-colored diamonds such as the deep-blue Hope Diamond are among the most valuable and sought-after diamonds in the world. In 2009, a 7-carat (1.4 g) blue diamond fetched the then highest price per carat ever paid for a diamond when it was sold at auction for 10.5 million Swiss francs (US$9.5 million at the time) which is in excess of US$1.3 ...

  4. List of countries by diamond production - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    This is a list of countries by diamond production, based on data reported by the Kimberley Process Certification Scheme. Diamond production [1] (million carats)

  5. Cullinan Diamond - Wikipedia

    en.wikipedia.org/wiki/Cullinan_Diamond

    Cullinan V is an 18.8-carat (3.76 g) heart-shaped diamond set in the centre of a platinum brooch that formed a part of the stomacher made for Queen Mary to wear at the Delhi Durbar in 1911. The brooch was designed to show off Cullinan V and is pavé-set with a border of smaller diamonds.

  6. Koh-i-Noor - Wikipedia

    en.wikipedia.org/wiki/Koh-i-Noor

    In his preface to the first edition of the book, Collins says that he based his eponymous "Moonstone" on the histories of two stones: the Orlov, a 189.62-carat (37.9 g) diamond in the Russian Imperial Sceptre, and the Koh-i-Noor. [84]

  7. Economy of Ghana - Wikipedia

    en.wikipedia.org/wiki/Economy_of_Ghana

    Ghana became the largest gold-producing country in Africa after overtaking South Africa in 2019. [28] The country is also the second-largest cocoa producer (after Ivory Coast). [29] Ghana is rich in diamonds, manganese or manganese ore, bauxite, and oil. Most of its debt was cancelled in 2005, but government spending was later allowed to balloon.

  8. Kimberlite - Wikipedia

    en.wikipedia.org/wiki/Kimberlite

    It is named after the town of Kimberley in South Africa, where the discovery of an 83.5-carat (16.70 g) diamond called the Star of South Africa in 1869 spawned a diamond rush and led to the excavation of the open-pit mine called the Big Hole. Previously, the term kimberlite has been applied to olivine lamproites as Kimberlite II, however this ...

  9. Fineness - Wikipedia

    en.wikipedia.org/wiki/Fineness

    24-carat gold is pure (while 100% purity is very difficult to attain, 24-carat as a designation is permitted in commerce for a minimum of 99.95% purity), 18-carat gold is 18 parts gold, 6 parts another metal (forming an alloy with 75% gold), 12-carat gold is 12 parts gold (12 parts another metal), and so forth.

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