The Steadfast Guide to Diamonds

Carat

The weight of the diamond is measured in carats: one carat equals 1/5th of a gram. A carat is divided into 100 points, so a 50-point diamond equals half a carat. The larger diamonds are rarer so their value increases more, such that, for example, a 1ct diamond would be more than double that of a 0.50 carat diamond.