The 4 C's
Carat weight alone does not determine a diamonds value. Two diamonds with the same carat can vary widely in price when the cut, color, and clarity are considered.
The cut of a diamond is the precise shape and positioning of its facets.
The ideal balance of brilliance, scintillation, and dispersion can make even the smallest diamonds beautiful.
The clarity is the determination of how flawless a diamond is and correlates directly with its value.
Under 1o-power magnification, a flawless stone will show no internal flaws (feathers, pinpoints, or clouds) as well as no external flaws (pits, scratches, or nicks). Flawless stones are extremely rare.
An ideal diamond is clear to the point of being colorless.
A diamond with chemical purity and perfect structure will have no hue, and this also results in a higher value.
There is a color grade scale from "D" (colorless) to "Z" (saturated).
"Carat" denotes the weight of a diamond.
One carat is 0.20 grams.
Carat weight alone does not determine a diamonds value.