Carat Weight

Size is the most visible factor that determines the value of a diamond. The price of a diamond rises exponentially according to its size.

By definition, 1 carat is 200 milligrams.  Since most diamonds sold in the market weigh less than 1 carat, the carat is usually subdivided into "points."  There are 100 points in 1 carat, so that a diamond weighing 3/4 carat would be a "75 point diamond."

1 carat = 200 milligrams = 100 points

Please note that Carat weight is not a factor which denotes diamond quality. It merely denotes the size of a diamond, by its weight.

Diamonds of 0.5 - 0.75 carat are very popular for their combination of size and value.

Large diamonds are rarer to find in mines than small ones, which makes large diamonds much more valuable.