The size, number, position, nature, and color or relief of characteristics determine the clarity grade. Very few diamonds are flawless, that means, show no inclusions or blemishes when examined by a skilled grader under 10X magnification. If other factors are equal, flawless stones are most valuable. Cloud A group of tiny white inclusions which result in a milky or cloudy appearance. Color Grading color in the normal range involves deciding how closely a stone's body color approaches colorlessness.
Most diamonds have at least a trace of yellow or brown body color.
With the exception of some natural fancy colors, such as blue, pink, purple, or red, the colorless grade is the most valuable. The upper part of the diamond above the girdle. Consists of a large flat area on top called a table, and several facets below it. Cu let The smallest facet at the bottom of the diamond. Cut can also mean shape, as in emerald cut or marquise cut.