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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. Engagement ring - Wikipedia

   en.wikipedia.org/wiki/Engagement_ring

   Engagement ring. Two engagement rings, as traditionally worn on the ring finger of the left hand. An engagement ring, also known as a betrothal ring, is a ring indicating that the person wearing it is engaged to be married, especially in Western cultures. A ring is presented as an engagement gift by a partner to their prospective spouse when ...

4. Diamond (gemstone) - Wikipedia

   en.wikipedia.org/wiki/Diamond_(gemstone)

   1.13-carat (226 mg) round diamond engagement ring. The origin of the custom to use diamonds in rings, and more recently, in engagement rings, can be traced back to the Middle Ages and even the Romans. The Romans valued the diamond entirely on account of the supernatural powers they ascribed to it.

5. See All of Jennifer Lopez's Six Engagement Rings - AOL

   www.aol.com/see-jennifer-lopezs-six-engagement...

   See all of her engagement rings, from Ojani Noa, Chris Judd, Ben Affleck, Marc Anthony and Alex Rodriguez, here. ... who would propose with an 8.5 carat blue diamond ring from Harry Winston. The ...

6. 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.

7. Diamond - Wikipedia

   en.wikipedia.org/wiki/Diamond

   Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Diamond as a form of carbon is a tasteless, odourless, strong, brittle solid, colourless in pure form, a poor conductor of electricity, and insoluble in water. Another solid form of carbon known as graphite is the chemically stable ...