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  2. 18 Most Expensive Gemstones in the World - AOL

    www.aol.com/finance/18-most-expensive-gemstones...

    A two-carat red beryl is considered to be as rare a find as a 40-carat diamond. The rare stone is only found in the U.S. ... Diamond. Cost: $25,000 to $150,000 or more per gram.

  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. Paragon (diamond) - Wikipedia

    en.wikipedia.org/wiki/Paragon_(diamond)

    The largest flawless diamond in the world is known as The Paragon, a D-color gem weighing 137.82 carats (27.564 g), [1] and the tenth largest white diamond in the world. [citation needed] The gem was mined in Brazil and attracted attention for being an exceptional white, flawless stone of great size. [2]

  5. Carat (mass) - Wikipedia

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

    The carat (ct) is a unit of mass equal to 200 mg (0.00705 oz; 0.00643 ozt), which is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, [1] [2] and soon afterwards in many countries around the world.

  6. The Winston Blue - Wikipedia

    en.wikipedia.org/wiki/The_Winston_Blue

    The diamond is flanked on either side by a pear-shaped diamond, which weigh approximately 1.00 and 0.96 carat respectively. The Gemological Institute of America certified on March 25, 2014 that the diamond was fancy vivid blue in color, had flawless clarity and was a type IIb diamond. [3]

  7. ‘Internally flawless’ blue diamond could fetch $50 ... - AOL

    www.aol.com/internally-flawless-blue-diamond...

    Known as “Bleu Royal,” the 17.6-carat blue diamond is among the rarest ever to be unearthed, according to Christie’s auction house. ‘Internally flawless’ blue diamond could fetch $50 ...

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