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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. De Grisogono - Wikipedia

   en.wikipedia.org/wiki/De_Grisogono

   In 2017, the company set a new record at Christie's Magnificent Jewels sale in Geneva when it sold the world's biggest-ever emerald cut diamond offered at auction. The 163.41-carat D Flawless stone, which was cut from a 404 carat rough, was incorporated into a necklace designed by Fawaz Gruosi.

4. Jewels of Elizabeth II - Wikipedia

   en.wikipedia.org/wiki/Jewels_of_Elizabeth_II

   A diamond necklace made by Cartier in the 1930s. It was a wedding gift to Elizabeth on her wedding to Prince Philip from the last Nizam of Hyderabad, Mir Osman Ali Khan, in 1947. The Nizam's entire gift set for the future Queen of the United Kingdom included a diamond tiara and matching necklace, whose design was based on English roses.

5. Huge diamond necklace worn at two British coronations ... - AOL

   www.aol.com/huge-diamond-necklace-worn-2...

   A diamond necklace that has been worn at two British coronations, and is thought to have stones from the infamous necklace at the heart of a Marie-Antoinette scandal, is expected to fetch up to $2 ...

6. Carat (mass) - Wikipedia

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

   Diamond-weighing kit, with weights labelled in grams and carats. 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 ...

7. Cullinan Diamond - Wikipedia

   en.wikipedia.org/wiki/Cullinan_Diamond

   Cullinan Diamond. The Cullinan Diamond is the largest gem-quality rough diamond ever found, [2] weighing 3,106 carats (621.20 g), discovered at the Premier No.2 mine in Cullinan, South Africa, on 26 January 1905. It was named after Thomas Cullinan, the owner of the mine. In April 1905, it was put on sale in London, but despite considerable ...