computing formula
1. (weight unit of diamonds, etc. ) carat (= 200mg)
2. (Purity unit of gold) Kelvin, and the purity percentage is 24 Kelvin. If it is 18 Kelvin, the purity is 18/24=75%.
3. The price of diamond = the square of weight * 1 carat market base price. 1 carat = 100 minutes, 1 gram =5 carats. A carat-sized cut diamond needs to dig 250 tons of mineral soil, which shows that diamonds are expensive.
The extended data carat (ct), commonly abbreviated as Ct in English, has been used as an internationally recognized gem measurement unit since 1907, which is the quality unit of pearls, diamonds and other gems and the purity ratio of precious metals. International standard 4C for evaluating diamonds. 4C refers to color, clarity, weight and cut.
The word "Kela" comes from the Greek word "Kela", which refers to carobseed, a plant widely spread from East Asia to the Middle East. Because its fruit is said to have almost the same weight, and the weight of diamond is the most easily measured feature in 4c, the early carob tree was used as the weight unit of jewelry and precious metals. One carat is equivalent to the weight of a small horn tree seed.
One carat origin:?
From 65438 to 0983, Mr. Tao of Chengdu Institute of Geology conducted a specific study, which confirmed that carat originated from the seed of carob tree in the Mediterranean region-rice bean, and the weight of this tree was about 200mg, which had nothing to do with the weight of Robinia pseudoacacia, Brucea javanica and Sophora japonica.
Oz (translated from Hong Kong into ounces) is an English unit of measurement, and the symbol is ounce or ounce. As a unit of weight, it is also called English ounces. ?
1 g is equal to 1000 mg, 1 mg is equal to 1000 μ g, and the mass units are in thousands. As we know, gems are usually measured in carats, and 1 carat is equal to 0.2g, that is, 1 carat is equal to 200mg. If converted into micrograms, 1 carat is 200,000 micrograms. And because 1 carat is equal to 100 point, 1 point is equal to 2 mg, and 1 point is equal to 2000 micrograms.
References:
Baidu encyclopedia-Kela