The 4 C's of DiamondsCut • Color • Clarity • Carats
Cut also refers to the number of facets that the diamond has. Although the industry recognizes 57 facets on a round cut as the ideal diamond, there are many other specialty cuts available.
A diamond’s weight is measured in what is known as a ‘carat’, which is a small unit of measurement equal to 200 milligrams and there are 142 carats to an ounce. Carat (ct.) is not a measure of a diamond’s size, since cutting a diamond to different proportions can affect its weight.