THE 4 C's: CARAT WEIGHT | CUT | COLOR | CLARITY
Carat is the measure of weight of a diamond. It does not measure size; nor should it be confused with karat—a measure of gold purity.
1 Carat = 0.2 grams or 0.007 ounce

The weight of the diamond and the price per carat determines the price of a diamond.
Total Price = Weight x Price per Carat

All other things being equal, the greater the carat weight, the more rare the diamond and the more expensive it is. Although many people equate "bigger" with "better," diamonds of all carat weight have the potential to be lively, exciting, and beautiful. The most important thing is to buy the one that's right for you.

To choose the ideal carat weight, consider the following:
• The recipient's personal style, finger size, and the size and style of the setting.
• Keep in mind that the smaller the finger, the larger the diamond will appear. A 1½-carat diamond solitaire looks much larger on a size 4 finger than a size 8.
• If you have already chosen a setting, make sure you choose a diamond that looks appropriate in the ring.