A diamond's weight is the simplest of its characteristics to measure, and from the earliest times has been the only measurement used to calculate the value of a diamond. The carat is a unit of weight which derives from the carob seed. The pods of the carob, or locust tree, contain tiny seeds which are remarkably consistent in weight. These seeds were used by early gem traders to weigh their diamonds. Based on a decimal system, a one carat weights 100 points, a 1/2 carat weights 50 points, etc. NOTE: Carat Weight has no bearing on a diamond's colour or clarity. It does have a significant impact on Cut. NEXT PAGE | Summary of the Five Cs 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24