Synthetic Moissanite, also known as synthetic moissanite, synthetic carbon silica (chemical composition SiC), has a dispersion of 0.104 larger than diamond (0.044) and a refractive index of 2.65-2.69 (diamond 2.42). It has the same diamond luster as diamond. The fire is stronger and closer to diamonds than any other imitation. This is manufactured by C3 of North Carolina, USA, and has patents for the production of synthetic silicon carbide in various countries around the world, and is being applied to the world.
According to the 4C classification standard of diamonds, the color, Clarity, Cut, and Carat characteristics of synthetic silicon carbide are:
Color: At present, synthetic silicon carbide is not colorless, mostly light gray green, light yellow, gray blue. According to GB/T16554-1996 "Diamond Grading Standard", the color grade is below 96, 95 (H, I) (see table below). Has dichroism (diamonds are not dichroic). GB/T16554-1996 colorless-yellow (brown) diamond color grading standard diamond color grade D100 white E99F98 excellent white G97H96 white I95 yellowish (brown, gray) white J94K93 light yellow (brown, gray) white L92M91 light yellow (brown, gray )N90<N<90 yellow (brown, gray)
Clarity: Synthetic silicon carbide is an equiaxed crystal system that can crystallize to 2-3 inches of columnar crystals. Some materials can be graded in the IF grade (Internally Flawless) (there is no inclusion in the diamond, only a very slight flaw, It can usually be removed by polishing); most synthetic silicon carbides have fine white-line inclusions composed of white dots, and the detection is mostly micro-level VS or ç‘•ç–µ-level SI. The inclusions are approximately perpendicular to the table top and are not completely parallel to each other (with a few degrees of difference); very few have dark metallic spheres.
Weight: Synthetic silicon carbide has a specific gravity of 3.22 (3.52 diamonds), which is about 10% lighter than diamonds. According to the standard turning of the garden drill, when the diameter is 6.5mm, the diamond generally weighs 200mg (ie one carat). The 6.5mm round synthetic silicon carbide produced by standard mechanics weighs only 160mg (80 points).
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