A one-half carat (0.50 ct) refers to the weight of a diamond or gemstone, not its size. One carat equals 200 milligrams, so a half-carat stone weighs 100 milligrams. While carat affects the gemstone’s value, the actual appearance and size also depend on its cut, shape, and setting. For example, a 0.50-carat round diamond may look slightly smaller or larger than another half-carat diamond based on how it’s cut. Half-carat diamonds are popular because they offer a balance of beauty, sparkle, and affordability.
A one-half carat diamond weighs 100 milligrams = 0.10 gram.
This indicator means that if all the diamonds in the ring were removed, their combined carat total weight, would be equal to one-half a carat.
The descriptor '.45' usually documents the carat weight of a diamond: meaning 45/100ths of a carat, or nearly half a carat.
If you mean 1/4 carat, that is one quarter of a carat or 25 points (one carat = 100 points) .
Generally, you would write .50 carat to represent a half-carat stone.
A carat is a unit of weight used for gemstones. One third carat is the weight of the diamond.
Total carat weight which the sum of the individual carat weights of all the diamonds in a piece of jewelry. One carat is divided into 100 parts, called points, so, a 25-point diamond weighs a quarter carat and a 50-point diamond weighs a half carat
Your question implies that the number is less than one full carat, so you could also write it as .59 carat -- rounding up, meaning that the stone weighs just over half a carat.
Half a carat is .50, and a quarter of a carat is .25, therefore 3/8ths of a carat is .375
One gram equals five carats; one carat equals one fifth of a gram. Can you do the math? three tenths
half = 1/2 = 0.5 = 0.50 < 0.58 → Yes.
It means that the total carat weight (t ct w) of both earrings together is 1 carat. In other words each stud will be half a carat.