Carat is the unit of mass (weight) of precious stones, and now 1 carat is equal to 0.2 g or 200 mg. One carat is divided into 100, such as 50 cents, or 0.5 carat, which is used to calculate smaller gems. Because the density of gems is basically the same, the heavier the gem, the bigger the volume. The bigger the gem, the rarer it is, and the higher the value per carat. According to the textual research of Huaxuan Jushi, the unit name of Kela originated from Ghana, a West African country in the13rd century, and its capital Accra is the earliest gold and diamond distribution center in the world. Due to the language communication barriers between countries, trade place names are used as units of measurement.

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Measurement of carat

1 carat = 200mg = 0.2g Klajo 205.3mg In the old gem book, if it is converted into the current carat, then one carat will be multiplied by 1.0265. This is only a general description, because the carat value of different countries or regions in the old days was different.

Diamonds weighing less than 1 carat are usually measured in "points", 1 carat = 100 carat. On the certificate of diamond, the weight of diamond is accurate to the third decimal place.

IGI uses an electronic balance with an accuracy of 0.0000 1 carat to weigh the accurate weight of diamonds, and records it in the diamond appraisal report, accurate to two decimal places. So a 25 cent diamond weighs 0.25 carat. Diamonds of the same quality, the greater the weight, the more precious.

Baidu Encyclopedia-Kela (Quality Unit)