Diamond cutting the roundness, depth, breadth and cut the evenness were determined with diamond luminosity, many gemologists think diamonds -cutting process is the most important diamond characteristics, because even if a diamond have a perfect color (color) and clarity (clarity), met bad -cutting also can make a diamond and lose its dazzling brilliance.

Ideal cutters: represent only 3% of the first-class quality diamonds can reach the standard. This kind of cutters that the diamonds almost reflect all into diamond light. A kind of decorous and outstanding cutters.

Very good cutters: represent about 15% of the diamond cut. Can make diamond reflected and standard grade cutters light, but the price lower.

Good cutters: represents about 25% of diamond cut. A diamond reflects mostly into drill in the internal light. VG much cheaper than level.

General cutters: on behalf of the roughness as 35% of the diamond cutting, is still high-quality diamonds, but generally cutters processing diamond reflected light than G level cutters.

Poor cutters: it contains all not meeting general cutters standard of diamonds. These diamond cutting or deep and narrow or shallow and wide easily let light from for edge or bottom to escape.