There is no direct relationship between millimeters and carat weight for diamonds. This is because gem-quality diamonds can be cut into many different shapes.
The top, measurable shape may belie the depth of the stone, and thus misrepresent its carat weight.
One hundred points are equal to one carat.
One hundred points make up one carat -- usually. Specifically, carat indicates the stone's weight; that the weight is described in points is not as precise as describing its weight in carats.
The number inside a diamond ring refers to the carat weight of the diamonds found in the ring. A .50 stamped inside a Diamond Solitaire ring means that it has a 1/2 Carat diamond while a .97 means that it is just below 100 points or One Full Carat.
plz tell how to calculate 23 carat gold from 24 carat
0.25 means its the carat of diamond,meaning you have quarter of carat real diamond
The diamond either weighs 100 points, or a full carat, or it weighs 80 points or 80/100ths of a carat.
First, understand that if your 'one carat' diamond has '80 points', it may not weigh one carat. Then, take your diamond to a certified gemologist who can tell you 'how much' can be attributed to your diamond.
If the stone is a round diamond, the stone measures about 10.6mm at the girdle. Remember carat is an indicator of weight, and millimeters is an indicator of length: the two are only loosely related in this case.
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."
No. Different cuts of diamond stones have different measuremenets, which are never directly related to the carat weight of the gem.
As far as gemstones are concerned, carat (karat) is used to measure their weight (as opposed to metals where carat refers to purity). There are 100 points (pts.) to a carat so a 1.0ct diamond is equal to 100 points; a half carat diamond is equal to 50 points and so on.
One hundred points are equal to one carat.
You could say that it was almost half a carat, since a full carat is sometimes called 100 points.
1 Carat = .2 grams = 100 points
'Cents' or points usually describe diamond weight that less than one carat. One carat equals 100 cents or 100 points.
If the 28 points to which you refer are based on a scale of 100 points equal to one carat, then these 28 points could indicate that the diamond in question weighs just over one quarter of a carat or 28/100ths.
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.