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  2. 18 Most Expensive Gemstones in the World - AOL

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  3. Moissanite - Wikipedia

    en.wikipedia.org/wiki/Moissanite

    Moissanite (/ ˈ m ɔɪ s ə ˌ n aɪ t /) [5] is naturally occurring silicon carbide and its various crystalline polymorphs. It has the chemical formula SiC and is a rare mineral , discovered by the French chemist Henri Moissan in 1893.

  4. Carat (mass) - Wikipedia

    en.wikipedia.org/wiki/Carat_(mass)

    [i] The carat is divisible into 100 points of 2 mg. Other subdivisions, and slightly different mass values, have been used in the past in different locations. In terms of diamonds, a paragon is a flawless stone of at least 100 carats (20 g). [3] The ANSI X.12 EDI standard abbreviation for the carat is CD. [4]

  5. Tsavorite - Wikipedia

    en.wikipedia.org/wiki/Tsavorite

    In late 2006, a 925-carat (185.0 g) crystal was discovered. It yielded an oval mixed-cut 325 carat (65 g) stone, one of the largest, if not the largest, faceted tsavorites in the world. A crystal that yielded a 120.68-carat (24.136 g) oval mixed-cut gem was also uncovered in early 2006. [ 7 ]

  6. Fineness - Wikipedia

    en.wikipedia.org/wiki/Fineness

    The karat (US spelling, symbol k or Kt) or carat (UK spelling, symbol c or Ct) [17] [18] is a fractional measure of purity for gold alloys, in parts fine per 24 parts whole. The karat system is a standard adopted by US federal law.

  7. Former US Marine went too far in fatal choking on New York ...

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    A prosecutor told jurors on Friday that the former U.S. Marine sergeant who fatally strangled Jordan Neely on a New York City subway car was indifferent to Neely's humanity, and needlessly ...

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