Although diamond carat weight is an important thing to consider so is the clarity, color and cut when purchasing your chosen stone. You will hear jewellers talk about the 4 “C’s” (Don’t get put off, it’s just like any profession they all have their own trade talk) The overall diamond carat weight is most likely to determine a diamond’s value. Fortunately the size is the easiest characteristic to measure. The term carat is derivative of the word carob. Carob seeds are similar in weight to each other, they are originally measured by comparison – one carob seed equaled one carat.
Your diamond carat weight is divided into 100 points. So a half-carat equals 50 points, and is expressed as 0.50ct. For example a one-and-three-quarter would be 1.75cts.
Although it is true that the larger the stone, the higher the price, it is not true that a one-carat diamond is twice the price of a half-carat diamond. Larger diamonds are found less frequently in nature, so a one-carat will actually costs much more than twice the price of a half size stone of the same quality.
Cut and mounting can also make a difference in the price. Remember that quality can be more important than size. A one-carat diamond with high color and clarity values might be more beautiful than a two-carat diamond with lower clarity and color values, despite a much higher cost. It is important to balance your priorities when shopping for a diamond.
Also remember, the smaller your finger, the larger the diamond will appear!