One kind of synthetic gems that is the nearest to the diamond
Synthetic Carborundum also is known as Synthetic Moissanite (chemical component SiC). Its 0.104 dispersion is bigger than real diamond (0.044), The refractive index is 2.65-2.69 (diamond 2.42).
The appearance, internal structure, and values of Moissanite are all strikingly similar to diamond. Even using diamond pen to test, it will also be defined as diamond. It is difficult to distinguish them.
Moissanite has the same adamantine luster with real diamonds while the “fire” is even stronger. It is the nearest to the diamond than any other before. It shines more brightly than diamonds with only 1/10 cost of them!