Advice 1: 1 carat is how many grams

Gemstone weight is not measured in grams. The conventional unit for determining the value of diamonds for many centuries is the CT - value, which throughout history has varied from 0,188 grams to 200 milligrams.
1 carat is how many grams

The formation of the carat as the international unit of measurement of weight



Precious stones and other gifts of nature are measured in carats. The roots that gave rise to the definition, go back centuries. One of the common opinions States that the diamond weight was originally measured in seeds of acacia. This plant grows in the Mediterranean. The pods of a shrub called "little horn," and in the Greek pronunciation is "carat".

Another assumption indicates that coral tree. The weight of its seeds is approximately equal to the weight of the average diamond. The Romans also measured the jewel seed plants. 24 grain was used as weight.
Greece minted coins whose weight corresponded to 24 seeds of acacia.


Measure in carats of the precious stones, the share of gold in the alloy and pearls. To measure the value of the latter and appreciate it was quite difficult. It depended on many factors. Mattered even batch cultured pearls.

Carats and grams



All this was only an approximate value. They can vary from area-grown tree, from the pods and even from humidity. Later, Karat began to measure in grams, but then it was not officially established value, how much weighs one carat. Even within a single country was recorded bounds from before 0,188 0,213 grams.
When trade became global, it became necessary to come to a single measurement value.


First made an attempt of the Paris merchants. At the meeting of the Precious chamber of 1877 was offered by the official measure: one carat corresponded 0,205 grams. However, the world community has not supported this initiative. Later, in 1907, took place the General conference in Paris, which was engaged in the consideration of a single system of weights and measures. One of the subpoenas was to determine the official values of karats. Now 1 carat is equal to 200 milligrams.

However, not all countries supported the establishment. The French had to be active in attracting the world community to create benchmark measures. Resolution in some countries were accepted, others were canceled, the third is simply ignored. But by 1914 the French had already gained weight in the eyes of the representatives of many countries. And finally, the action was a success. In 1930 finally established, the proposed measure of weight of precious stones and has become an international unit of measurement.

Advice 2: What is measured in carats

Carat is a unit of mass that emerged in the middle East and known in jewelry since ancient times. To this day it is used to measure the volume of gems and purity of gold. Share a carat are expressed in fractions.
What is measured in carats
CT – disambiguation, indicating a measure of weight, equal to 200 milligrams, or 0.2 g. Often in carats to measure precious stones and gold. The word carat is of Arab origin ("kirata") and originally meant the pod of the carob tree, whose seeds, in ancient times was used as a measure of mass.

Carat as a unit of measurement samples



The British carat – unit of measurement of the percentage of gold in jewelry, bullion, coins, equal to 1/24 the mass of pure substance present in the total mass. As a rule, is used for marking purity of gold and is denoted by a capital Latin letter K. as an example: 583-I test corresponds to a 14KT gold, 375-I – 9K. The purest gold is 24K.
The seeds of the carob tree are homogeneous and have the same weight, and therefore became the unit of measurement.



Good to know that gold is soft and very often combined with the so-called "filler metals" (such as: silver, copper, Nickel). White gold, the shade obtained by adding silver, palladium or platinum, will have more carats than the one that fused with Nickel.

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To measure the mass of gemstones and pearls used metric carats. It was installed the 4th General conference on weights and measures in 1907 and came to the Soviet Union in 1922. Unlike the British, it is abbreviated as "ct" (in Russian language – "CAW"). The abbreviation "ct TW" means total weight of multiple diamonds in jewelry.
The scale of measurement carat is divided into one hundred units, so the gemstones can be measured with an accuracy of up to 0.01 carats.


It should be noted that different stones of the same weight will not necessarily have the same size, because some of them have different density. So, two diamonds of the same carat weight can cost differently, depending on such additional factors as cut, clarity, color. But in General, the larger the carat, the higher the price – the large diamonds are quite rare.

In order to calculate the volume of a standard round diamond, mounted in jewelry, apply the formula M=(D^2) x H x 0,0061, where D – diameter, H – height, M – mass in carats.

There is another way: the approximate weight of a diamond can be calculated by the table diameter ratio and CT.
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