In the gem trade, “karat” is often used as the unit of quality. The term carat, originally in Greek, means the seed of a kind of “carob tree” that grows on the Mediterranean coast of Europe. The ancients believed that the quality of each seed was the same, so it was used as a weight for weighing gems, and the quality of gems was also expressed in several carats. It is also said that more than 3000 år sedan, people found the first diamond in India. There was a carob tree there. The beans on the tree weighed 0.2g. People used the quality of one bean as the quality of the diamond.
I själva verket, the seeds of carob are not the same weight. De senaste åren, some people in our country have collected hundreds of these seeds. After weighing them with a precision balance, they know that their actual mass is 143-240mg, which shows the big difference. I dag, when the measurement method is becoming more sophisticated, countries have set a standard quality for carats. I början, it was not uniform. In some countries, 210 mg was 1 ct, while in other countries, 180 mg was 1 ct. I 1877, Britain, Frankrike, and the Netherlands, the major gem trading countries at the time, agreed that 205mg was 1ct. I 1907, in order to facilitate conversion to the metric system, the world unified regulations:
1ct = 200mg = 0.2g
This is called “Metric Carat”.
Since diamonds are very precious, diamonds as small as 0.01ct are also useful. In order to easily explain the quality of small diamonds, foreign countries use “Point”, the quality of which is:
1ct = 100Point
Point is translated as “分” according to Chinese custom, som är, 1ct = 100 points. It is very convenient to use points to express the quality of small diamonds. Till exempel, a small diamond weighing 0.01ct can be called a 1-point diamond, a small diamond weighing 0.04ct is called a 4-point diamond, and a 20-point diamond is a diamond weighing 0.2g.
OEM/ODM smycken Tillverkare Design Anpassad dina egna smycken
Låt oss komma igång : mo@kingjy.com
Guangzhou Jingying Focus på anpassade grossistringhalsband armband örhängen Sterling Silver 925 smycke,Sterling Silver Gold pläterad med 18K,14K,24K gult guld,Vitt guld och rosguld.,Logotypmärke eller andra ord med lasergravering enligt kundens krav.
Vår månatliga produktionskapacitet är upp till 50,000 bitarmband halsband örhängen ring smycken. Jingying ingår ett partnerskap med stormarknader,smyckekedjebutik,utloppsbutiker,smycken grossist,handlare och smyckemärke,Professionell tillhandahålla skapa anpassade smycken och massproduktion av hög kvalitet 925 Sterling Silver Jewelry Service.
OEM/ODM smycken Tillverkare Design Anpassad dina egna smycken
Låt oss komma igång : mo@kingjy.com
Guangzhou Jingying Focus på anpassade grossistringhalsband armband örhängen Sterling Silver 925 smycke,Sterling Silver Gold pläterad med 18K,14K,24K gult guld,Vitt guld och rosguld.,Logotypmärke eller andra ord med lasergravering enligt kundens krav.
Vår månatliga produktionskapacitet är upp till 50,000 bitarmband halsband örhängen ring smycken. Jingying ingår ett partnerskap med stormarknader,smyckekedjebutik,utloppsbutiker,smycken grossist,handlare och smyckemärke,Professionell tillhandahålla skapa anpassade smycken och massproduktion av hög kvalitet 925 Sterling Silver Jewelry Service.













