I have to ask, what is a moissanite?!

posted 3 years ago in Rings
Post # 3
Member
9137 posts
Buzzing Beekeeper
  • Wedding: November 2013 - St. Augustine Beach, FL

@Djacks88:  Lab created mineral that is almost identical to a diamond.

Moissanite /ˈmɔɪsənt/[4] originally referred to a rare mineral discovered by Henri Moissan having a chemical formula SiC and various crystalline polymorphs. Earlier, this material had been synthesized in the laboratory and named silicon carbide (SiC).

Mineral moissanite was discovered by Henri Moissan while examining rock samples from a meteor crater located in Canyon DiabloArizona, in 1893. At first, he mistakenly identified the crystals as diamonds, but in 1904 he identified the crystals as silicon carbide.[5][6] The mineral form of silicon carbide was named moissanite in honor of Moissan later on in his life.”

http://en.wikipedia.org/wiki/Moissanite

Post # 4
Member
9137 posts
Buzzing Beekeeper
  • Wedding: November 2013 - St. Augustine Beach, FL

See also: http://en.wikipedia.org/wiki/Silicon_carbide

As a gemstone used in jewelry, silicon carbide is called “synthetic moissanite” or just “moissanite” after the mineral name. 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 stronglybirefringent. For this reason, moissanite jewels are cut along the optic axis of the crystal to minimize birefringent effects. It is lighter (density 3.21 g/cm3 vs. 3.53 g/cm3), and much more resistant to heat than diamond. This results in a stone of higher luster, sharper facets and good resilience. Loose moissanite stones may be placed directly into wax ring moulds for lost-wax casting, as can diamond,[54] as moissanite remains undamaged by temperatures up to 1800 °C. Moissanite has become popular as a diamond substitute, and may be misidentified as diamond, since its thermal conductivity is close to that of diamond, more than any other diamond substitute. Many thermal diamond-testing devices cannot distinguish moissanite from diamond, but the gem is distinct in its birefringence and a very slight green or yellow fluorescence under ultraviolet light. Some moissanite stones also have curved, string-like inclusions, which diamonds never have.[55]

Post # 6
Member
11712 posts
Sugar Beekeeper
  • Wedding: November 1999

It’s a lab-created simulant.  Google them and I’m sure you’ll find some side by side comparisons to see the differences and similarities!

 

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