If the diamond is a round brilliant cut, the measurement at the girdle of a diamond of this carat weight measures about 5.2 mm.
If the diamond is not a round brilliant cut, the measurement will be different.
It all depends on the shape you select. For e.g. a GIA certified around 0.50 carat measures width 5.13mm x length 5.11mm and a princess shape measures width 3.84mm x length 4.08mm.
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.
Diamond sizes are dependent on the size of the stone mined. Diamonds are sold by various weights, including logical increments such as quarter, half and one carat.
If by PTS you mean points, then your question becomes "How many points equal one carat in a diamond?" One hundred points equal one carat when speaking of diamonds. Karats measure purity of metal, not diamond weight.
A 1.00 point diamond is one carat, so a .12 point diamond is a little over 1/10th of a carat.
The letters CT stand for carat, the weight measurement for diamonds. One full carat -- 1.00 CT -- weighs .02 grammes. A diamond weighing 0.010 carat equals one one-hundredth of a carat.
A one-half carat diamond weighs 100 milligrams = 0.10 gram.
One carat weight of diamond weighs .20 grammes, so your diamond is about half that weight, or roughly half a carat.
A one carat diamond weighs one carat and contains one carat.
A one-half carat diamond, in a round brilliant cut, measures about 5.2MM at the girdle.
One carat diamond weight is equal to .20 grammes.
A carat is a measurement of diamond weight. From Amazon.com: "Carat is the unit of measurement used to describe the weight of diamonds. One carat is equal to 0.2 grams, or 0.007 ounces (avoirdupois). Five carats equals 1 gram, and 141.7 carats equals 1 ounce."
A princess cut of one carat measures 5.5mm x 5.5mm; one half carat of this cut measures 4.4mm x 4.4mm. Your diamond is about half way in between these weights, and may weigh about .75 carat. A certified gemologist can give you an exact weight.
A one carat diamond weighs one carat, or .20 grammes.
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 carat is a standard unit of measure that defines the weight of a diamond. One carat is equivalent to 200 milligrams. Carat sizes are also expressed as “points”, with a one carat diamond equaling 100 points, a one-half carat diamond being 50 points, a three-quarter carat diamond being 75 points, and so on.
A one carat diamond weighs one carat, or .20 grammes.
One carat of diamond in carat total weight equals one carat. One thousand dollars worth of diamond in total carat weight depends on the cut, colour, clarity and individual carat weight of the stones in the group.