What is a point in diamond weight?
By Jared James · Last updated 21 May 2026
Definition
A point is one one-hundredth of a carat, so there are 100 points in a full carat. The unit is used to describe small diamond weights precisely without resorting to decimal fractions; a jeweller might call a stone a fifty-pointer rather than saying it weighs 0.50 carats. You will also hear it in shorthand conversation: a thirty-point diamond, a seventy-five point diamond. Points only apply to weight, not physical size, because the relationship between carat weight and diameter varies depending on the cut.
Frequently asked questions
- How many points are in one carat?
- There are exactly 100 points in one carat. So a 50-point diamond is half a carat, a 25-point diamond is a quarter carat, and so on. The system makes it easy to describe small fractional weights in a clean, whole number.
- Does a higher point weight mean a larger-looking diamond?
- Heavier diamonds are generally larger, but the cut affects how much of that weight is visible from above. A well-cut diamond spreads its weight across its table, while a deep cut stone carries more weight in the base, making it look smaller than its carat weight suggests.
- What does 0.50 carats mean in points?
- 0.50 carats is 50 points, which is half a carat. Jewellers and gemologists often say fifty-pointer as shorthand. At a typical round brilliant cut, a 50-point stone is usually around 5mm in diameter.
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