A totally colorless diamond allows light to pass through it easily, resulting in the light being dispersed as the color of the rainbow. Colors are graded from totally colorless to light yellow. The diferences from one grade to the other are very subtle and it takes a trained eye and years of experience to color grade a diamond. An inclusion can interfere with the light passing through the diamond. The fewer the inclusion, the more beautiful the diamond will be.
Diamonds have the capability of producing more brilliance than any other gemstone.
A diamond that is free of inclusions and surface blemishes is very rare and therefore very valuable. This is the weight of a diamond measured in carats. The carat-weight of a diamond is the easiest measurement to determine. Most importantly, two diamonds can be of equal carat-weight, but their value can differ greatly due to their cut, color, and clarity. Don't rush into your diamond purchase.