ほとんどの人は、カラットとはダイヤモンドの実際のサイズを指すと考えています, 実際には、それがダイヤモンドの重量を定義する標準的な測定単位である場合. 1カラットは以下に相当します 200 ミリグラム. カラットサイズは「ポイント」とも表現されます。, 1カラットのダイヤモンドと同等 100 ポイント, a one-half carat diamond being 50 ポイント, a three-quarter carat diamond being 75 ポイント, 等々. Larger diamonds are much rarer than smaller ones.
Since a carat is a unit of measure and not size, two diamonds of the same carat weight may appear to be different sizes depending on how the diamond is cut. Some diamonds will have extra weight on the bottom part — or pavilion — of the stone, and therefore appear smaller. A premium cut Canadian diamond is perfectly cut, and will appear larger than many diamonds of a heavier carat weight.
If size or carat weight is your most important attribute, (for many people it is very important) that is perfectly acceptable. You may want to also consider the other 3 Cs to make sure you understand your tradeoffs.