What is a carat?

Andrey Kim
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What is a carat?

Originally, carats were called carob pods, the seeds of which were used earlier for weight estimation. Nowadays carat is known as a unit of measure for mass or volume, as well as a measure used to assess the purity of gold. In this article we will tell you more about what a carat is and how it happens.

Carat as a measure of weight

The metric carat is a non-systemic unit of mass change, officially introduced 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, moreover, a measure of weight "English carat", which is equivalent to 105 mg, as well as the Arabian carat, equal to about 223 mg.

Carat as a measure of volume

Egyptian carat is used to measure the volume and it is equal to 0.064 liters. Egyptian carats are also called "kirat".

Carat as a measure of the sample

The British carat is equivalent to 1/24 of the mass of the pure substance in the total mass. Thus, the more a carat, for example, in gold, the more pure and expensive it is considered.In accordance with the purity of the substance gold is assigned to the sample.

The minimum gold sample is 375th, which is equivalent to 9 carats, the highest - 999.9th - is pure gold, the sample is equivalent to 24 carats. The most popular gold sample used in jewelry is the 585th, which is equivalent to 14 carats.