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2. Diamond clarity - Wikipedia

   en.wikipedia.org/wiki/Diamond_clarity

   Diamond clarity is the quality of diamonds that relates to the existence and visual appearance of internal characteristics of a diamond called inclusions, and surface defects, called blemishes. Clarity is one of the four Cs of diamond grading, the others being carat , color , and cut .

3. Scratch hardness - Wikipedia

   en.wikipedia.org/wiki/Scratch_hardness

   Scratch hardness test or scratch test refers to any of a number of methods of measuring scratch hardness. Resistance to abrasion is less affected by surface variations than indentation methods. Scratch hardness is measured with a sclerometer. [1] Attempting to scratch a surface to test a material is a very old technique. [2]

4. 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. Best for wedding jewelry: Blue Nile. Best for fine jewelry: James Allen. Best for affordable jewelry: Baublebar.

5. Vickers hardness test - Wikipedia

   en.wikipedia.org/wiki/Vickers_hardness_test

   The Vickers test can be used for all metals and has one of the widest scales among hardness tests. The unit of hardness given by the test is known as the Vickers Pyramid Number (HV) or Diamond Pyramid Hardness (DPH). The hardness number can be converted into units of pascals, but should not be confused with pressure, which uses the same units ...

6. Superhard material - Wikipedia

   en.wikipedia.org/wiki/Superhard_material

   In 2001, a diamond-like-structured c-BC 2 N was synthesized at pressures >18 GPa and temperatures >2,200 K by a direct solid-state phase transition of graphite-like (BN) 0.48 C 0.52. The reported Vickers and Knoop hardnesses were intermediate between diamond and c-BN, making the new phase the second hardest known material. [39]

7. 11 of the Best Lab-Created Diamond Earrings That Seriously ...

   www.aol.com/entertainment/11-best-lab-created...

   Looking for a pair of dangling drop earrings? These pear-shaped diamonds will look beautiful swaying just beneath your ears. This is another sterling silver pair that lets you wear diamonds ...