Diamond carat weight of the unit

How people choose Diamond  Industry insiders, the value of the diamond depends on its weight, color, clarity and cut, which is commonly referred to as "4C", that is Caratage (carat), Color (color), Clarity (Clarity), Cut (cut workers). The four accounted for 40%, 20%, 20%, 20% of GDP.

Diamond carat weight of the unit, the more weight the better; for color, the international Common Criteria is starting from D to Z so far. Where D is the best, Z the following as industrial diamonds; internationally often IF, VVS, VS, SI, I come to the diamond clarity grading, where IF is the best, I worst; cut, according to GIA (Gemological Institute of America) standards for cut, can be divided into five levels, including perfect (Excellent), good (Very Good), Good (Good), general (Fair) and poor (Poor).

Experts say, like people, each diamond has its own "identity card", China's domestic diamond with GIA certificate majority. All information will be on the diamond described on the certificate. People to buy diamonds, the business should produce the certificate. In addition, some businesses also provide NGTC certificate.