The 4Cs stand for carat weight, color, clarity and cut. Diamonds are graded in each of these areas. Taken collectively, those grades determine a diamond’s value.
The weight of a diamond is expressed in carats. One carat is equal to 200 milligrams,
Color evaluates how colorless, near-colorless or yellow-brown tinted it is on a scale of D-Z.
Clarity evaluates a diamond’s freedom from internal and external clarity characteristics.
Cut evaluates a diamond’s craftsmanship and quality of light behavior.