What is GRA: Global Gemological Research Association (GRA) is an independent jewel institute. Specializing in identifying gemstones and jewels. They Provide reliable and accurate gemstones and jewels testing service. Our quality report is certified by experienced professional gemologists. 

Moissanite is one of the hardest gemstones on earth, and in the gemstone world, second only to diamonds in durability. It is much harder than stones such as sapphires, emeralds or rubies and an excellent option for daily wear.

Moissanite is naturally occurring silicon carbide and its various crystalline polymorphs. It has the chemical formula SiC and is a rare mineral, discovered by French chemist Herni Moissan in 1893. He discovered the Mineral Moissanite while examining rock samples from a meteor crater located in Canyon Diablo, Arizona. At first, he mistakenly identified the crystals as diamonds, but in 1904 he identified the crystals as silicon carbide. Silicon carbide is useful for commercial and industrial applications due to its hardness, optical properties and thermal conductivity. Moissanite, in its natural form, remains very rare. It has been discovered only in a few rocks, from upper mantle rock to meteorites.