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2. Moissanite - Wikipedia

   en.wikipedia.org/wiki/Moissanite

   A moissanite engagement ring Moissanite: emerald cut. Moissanite was introduced to the jewelry market as a diamond alternative in 1998 after Charles & Colvard (formerly known as C3 Inc.) received patents to create and market lab-grown silicon carbide gemstones, becoming the first firm to do so. By 2018 all patents on the original process world ...

3. Silicon carbide - Wikipedia

   en.wikipedia.org/wiki/Silicon_carbide

   Moissanite is similar to diamond in several important respects: it is transparent and hard (9–9.5 on the Mohs scale, compared to 10 for diamond), with a refractive index between 2.65 and 2.69 (compared to 2.42 for diamond). Moissanite is somewhat harder than common cubic zirconia. Unlike diamond, moissanite can be strongly birefringent.

4. Material properties of diamond - Wikipedia

   en.wikipedia.org/wiki/Material_properties_of_diamond

   Because of diamond's perfect and easy cleavage, it is vulnerable to breakage. A diamond will shatter if hit with an ordinary hammer. [12] The toughness of natural diamond has been measured as 2.0 MPa⋅m 1/2, which is good compared to other gemstones like aquamarine (blue colored), but poor compared to most engineering materials. As with any ...

5. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   The simulants imitate the look and color of the real stone but possess neither their chemical nor physical characteristics. In general, all are less hard than diamond. Moissanite actually has a higher refractive index than diamond, and when presented beside an equivalently sized and cut diamond will show more "fire".

6. Mohs scale - Wikipedia

   en.wikipedia.org/wiki/Mohs_scale

   Diamond (Mohs 10) is 1500 (off scale). Diamond was the hardest known naturally occurring mineral when the scale was designed, and defines the top of the scale, arbitrarily set at 10. The hardness of a material is measured against the scale by finding the hardest material that the given material can scratch, or the softest material that can ...

7. Trump advisers seek to shrink or eliminate bank regulators ...

   www.aol.com/news/trump-advisers-seek-shrink...

   (Reuters) -U.S. President-elect Donald Trump's transition team is exploring ways to significantly reduce, merge, or even eliminate the top bank regulators in Washington, the Wall Street Journal ...