A carat is the weight of a precious stone, and is a easiest way to measure a diamond.
one carat is equals to 200 miligrams.

A diamond clarity is determined by its number and location of "inclusions" or flaws,which can interfere with light passing through the diamond.

A diamond's "cut" refers to both the shape of a diamond(round,cushion,
pear,and on) as well as the facets: the size and amount of facets which significantly impact a diamond's light dimensionality.

White diamonds are rated in color from D(absolutely colorless) to Z (light yellow)
diamond is preferable because allows light to pass through, resulting in more dimension.