![]() ![]() But the price differences between the two can be significant. Visually, there’s little difference between a 0.99 carat diamond and one that weighs a full carat. WHAT ARE “MAGIC SIZES”? Some weights are considered “magic sizes” – half carat, three-quarter carat, and carat. The carat is the same gram weight in every corner of the world. Early gem traders used the small, uniform seeds as counterweights in their balance scales. HOW DID THE CARAT SYSTEM START? The modern carat system started with the carob seed. This short video explains carat weight and shows how diamonds are weighed in GIA’s lab on an extremely precise electronic scale. It’s important to remember that a diamond’s value is determined using all of the 4Cs, not just carat weight. ![]() ![]() But two diamonds of equal carat weight can have very different values (and prices) depending on three other factors of the diamond 4Cs: Color, Clarity, and Cut. A two-pointer diamond refers to a 0.02 carat stone, and so forth. A 1.08 carat stone would be described as ‘one point oh eight carats.’ĭiamond images are for reference only and may vary based on screen size.Īll else being equal, diamond price increases with diamond carat weight because larger diamonds are more rare and more desirable. A one-pointer refers to a 0.01 carat diamond. For instance, the jeweler may refer to a diamond that weighs 0.25 carats as a ‘twenty-five pointer.’ Diamond weights greater than one carat are expressed in carats and decimals. A jeweler may describe the weight of a diamond below one carat by its ‘points’ alone. Each carat can be subdivided into 100 ‘points.’ This allows very precise measurements to the hundredth decimal place. A metric “carat” is defined as 200 milligrams. Diamond Carat Weight Measures a Diamond’s Apparent Size Diamond carat weight is the measurement of how much a diamond weighs. ![]()
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