DIAMOND CARATAGE

The unit of weight used for diamonds and gem-stones is the metric Carat (ct), equaling 0.2 grams. Because larger diamonds are less frequently found, as compared to smaller stones, their value increases exponentially with the weight  (for example, a 1.00 ct diamond may be worth about four times the value of a comparable 0.50 ct stone).  Weight in diamonds under one carat is also referred to as points. A diamond that weighs 0.33 ct is often called a 33 pointer.