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2. Cubic zirconia - Wikipedia

   en.wikipedia.org/wiki/Cubic_zirconia

   It is a dense substance, with a density between 5.6 and 6.0 g/cm 3 —about 1.65 times that of diamond. Cubic zirconia is relatively hard, 8–8.5 on the Mohs scale—slightly harder than most semi-precious natural gems. [1] Its refractive index is high at 2.15–2.18 (compared to 2.42 for diamonds) and its luster is Adamantine lustre.

3. Tavernier Blue - Wikipedia

   en.wikipedia.org/wiki/Tavernier_Blue

   The Tavernier Blue was removed from the fleece and re-cut by court jeweler Jean Pitau into the 68-carat French Blue in 1775, [1] [3] on the orders of Louis XV. It was then returned to the Crown Jewels. [5] The cubic zirconia replica of the Tavernier Blue diamond created by Scott Sucher

4. 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.

5. The 10 best places to buy jewelry online in 2024 - AOL

   www.aol.com/lifestyle/best-places-to-buy-jewelry...

   Best for diamond jewelry: Brilliant Earth. Best for gemstone jewelry: Shane Co. ... It’s made with a 2.75-carat lab-grown diamond with an elegant white gold band. $5,236 at Blue Nile.

6. Diamond simulant - Wikipedia

   en.wikipedia.org/wiki/Diamond_simulant

   Its low cost and close visual likeness to diamond have made cubic zirconia the most gemologically and economically important diamond simulant since 1976. A diamond simulant, diamond imitation or imitation diamond is an object or material with gemological characteristics similar to those of a diamond.

7. 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 ...