What is carat?
Initially, a carat was a carob podA tree whose seeds were used earlier for weight estimation. Nowadays, carat is known as a unit of measurement of mass or volume, as well as the measure used to evaluate the purity of gold. In this article I will tell you in more detail about what a carat is and how it happens.
Carat as a measure of weight
Metric carat is an extra-systemic unit of mass change, introduced officially in 1907 at the General Conference on Weights and Measures in Paris. In the USSR, the carat was adopted in 1922.
One carat is equivalent to 0.2 grams. This measure is actively used by jewelers to estimate the mass of precious stones, as well as pearls
There is, in addition, a measure of the weight of "English carat", which is equivalent to 105 mg, and also an Arab carat, equal to about 223 mg.
Carat as a measure of volume
Egyptian carat is used to measure the volume and is equal to 0.044 liters. Egyptian carat is also called "kirat".
Carat as a measure of a substance sample
British carat is equivalent to 1/24 of the mass of puresubstances in the total mass. Thus, the more carats, for example, in gold, the more pure and expensive it is considered. In accordance with the purity of the substance, gold is assigned a sample.
The minimum test of gold is 375thequivalent to 9 carats, the highest - 999.9th - it's pure gold, the sample is equivalent to 24 carats. The most popular gold sample used in jewelry business is 585th, it is equivalent to 14 carats.