Most often it is done using CTin the relative weight. They help jewelers determine the weight, and,consequently, the value of each diamond. When weighing this precious stone is considered the accuracy to thousandths carat. But weight records are taken into account only two digits after the decimal point, and the third, if not 9, is removed. It should be noted that one carat is equal to 0.2 grams. The smallest diamond is considered to be a diamond weighing 0.01 carats. If the stone is of even less weight, it is called diamond grit. Even though it can be difficult to discern (diameter is 1mm), in jewelry the use of they also find.
The second method, which is used to determine the weight of a diamond is the measurement of the diameter of the stone by using calipers. There are also special tables that show the ratio of the diameter of the stone and its weight. But this measurement is very precise. For example, a stone of 2 mm will have a weight of 0.03 caratand the stone is 5.2 mm and 0.5 carats, and the stone 9.4 mm will have a weight of 3 carats.
Often, we need to know the weight of the stone, which is already in the product, that is enshrined in it and, of course, to get him out of there. In this case, we can calculate the mass of the stone on a specially calculated formula. This formula is suitable for stones standard round cut. But it is important to remember that in this way possible errors. So, the formula looks as follows: M=(D^2) x H x 0,0061. It uses the following notation D-is the mass of the diameter, H is the height of the stone, and M are respectively the desired weight in caratsAh. It should be noted that there is a classification of rocks based on their weight. Thus, there are small (up to 0.29 caratsand up), medium (up to 0.99 carats) and large stones (>1 carat).