Generally, you would write .50 carat to represent a half-carat stone.
The total weight of all the diamonds combined in the carat total weight equals one half carat -- .50. The mm measurement of each individual diamond does not depend on the total carat weight of the collection.
A two-carat diamond is a gemstone that weighs two carats.
A 60-point diamond weighs just over half a carat (.50 carats). The size of the ring is not related to the weight of the diamond.
The size of these two objects is exactly the same: 5mm.
The weight of a carat is equivalent to 200 milligrams, so a two-carat diamond weighs 400 milligrams.
Half carat is the term used to measure the weight of the real diamond. A diamond's weight does not define or detract from the fact that the diamond is or is not a real diamond.
One carat weight of diamond weighs .20 grammes, so your diamond is about half that weight, or roughly half a carat.
A one-half carat diamond weighs 100 milligrams = 0.10 gram.
A half carat diamond of this cut measures 5.2 mm at the girdle; a .65 carat diamond measures 5.6 mm at the girdle. A certified gemologist can give you the exact carat weight of your diamond.
1 carat is 0.2g, so 1/2 of a carat equates to a 0.1g gemstone.
The descriptor '.45' usually documents the carat weight of a diamond: meaning 45/100ths of a carat, or nearly half a carat.
Carats in diamond weight can be divided into 100ths, meaning that a quarter carat stone could be described as a .25 carat diamond. In your case, you could describe this stone, as just over half a carat or .58 carat diamond. Less than full carat stones are also called points: a 58 point stone in your case.
The value of a diamond depends on its cut, its clarity, its colour and its carat weight. A local jeweler can give you the answer you want.
A forty-point diamond is nearly half a carat, which would be fifty points.
The total weight of all the diamonds combined in the carat total weight equals one half carat -- .50. The mm measurement of each individual diamond does not depend on the total carat weight of the collection.
You could say that it was almost half a carat, since a full carat is sometimes called 100 points.
Any diamond is worth what someone will pay you for it. You can purchase a marquis diamond of this carat weight -- half a carat -- today on Blue Nile and spend between US$516 and US$2,935, depending on the clarity and colour that you want.