Diamond being held with tweezers, ready to be set in a ring.

Diamond Carat

This is the unit of measure used to specify a diamond’s weight. A carat is a small unit of measurement equal to 200 milligrams. Carat is not a measure of a diamond’s size, but rather a measure of a diamond’s weight. One carat can also be divided in 100 points. A .75 carat diamond is the same as 75 points or 3/4 carat diamond. Because larger diamonds are found less frequently in nature, they are more valuable. Therefore, a 1 carat diamond will cost more than twice a 1/2 carat diamond, assuming other characteristics are similar. The most important thing to remember when it comes to a diamond’s carat weight is that it is not the only factor that determines a diamond’s value. The diagram to the right shows the size of various carat weights of a diamond in relation to each other.

Engage with our in-depth analysis about diamond options by exploring A Comprehensive Guide to Choosing Lab-Grown Diamonds.

About the Author
Rustin Yasavolian, CEO of Masina Diamonds

Rustin Yasavolian

CEO & Second-Generation Jeweler

Rustin grew up in the Masina showroom, learning the art of fine jewelry from the family that started it all in 1984. Today he leads Masina Diamonds with the same warmth, honesty, and personal touch — helping couples design rings that feel as meaningful as the moments they mark. Every piece begins with a conversation, and Rustin is always happy to start one.

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