Cuts that are too deep or too shallow allow light to escape before reflecting through the top of the stone. Color A Diamond is the only stone which the absence of color makes the stone more valuable. Visible differences between one grade of color and the next grade are very subtle. Carat Weight Diamonds can be found in all shapes and sizes. The size of the diamond is determined by its weight in carats.
Larger diamonds are more rare, and command a higher price.
While size is an obvious factor in determining the value of a diamond, bigger is not necessarily better, all C's should be considered. Clarity Most diamonds contain inclusions. Inclusions are natural birthmarks and considered nature's fingerprints on the diamond. A diamond's clarity is determined under 10-power magnification by a trained eye, taking into account the number, size, type, and location of the inclusions. The fewer inclusions in a diamond, the more valuable it is.