Diamond Carat Sizes

Understanding the 4 c s of a diamond color cut carat clarity and the factors that impact its quality price and value.

Diamond carat sizes.

The surface area is 6 23x6 2mm. How large is a half carat diamond. Likewise the physical size of a 2 carat diamond 8 2mm diameter isn t twice as big as that of a 1 carat diamond 6 5mm diameter. Printable carat weight to mm chart.

Here s a free diamond sizing chart that. That is 1 5th of an inch. Today a carat is equal to exactly 0 2 grams about the weight of a paper clip. A half carat diamond is usually 5 1mm in diameter.

The diamond on the left is 1 00 carat and has a good cut. Hopefully this clears up the misunderstanding of carat weight and actual sizes. While carat is the standard unit of measurement the millimeter size measurement of a diamond tells you its true physical size. Diamonds are sold by the carat shown as ct which is actually a unit of weight though most think of a carat in terms of size.

The diamond on the right weighs in at 0 92 carats and has an excellent cut. So even though the two diamonds have different carat sizes they have the same surface area because of the poorer cut of the first one about 10 of the carat weight is wasted. The word carat comes from the carob seed the original unit of measure for diamond traders. So while the one carat is double the weight the face of the half carat diamond is only 21 smaller.