2. How to distinguish the grading of diamond color: There are three series of diamond colors: Cape series: including colorless, light yellow to yellow diamonds.
3. Brown series: including brown diamonds with different strengths.
4. Color series: including pink, purple, gold, blue and green diamonds.
5. Most gem-grade diamonds belong to Cape series, namely colorless-light yellow series. When identifying the color of diamonds, the identified diamonds are compared with a set of international standard colorimetric stones, and the colors of the standard colorimetric stones are arranged from colorless D (the highest grade) to yellow Z in turn. ..
6. The color classification of diamonds is based on the color classification established by GIA, American Gemological Institute, from "D" (transparent and colorless, starting from the initial letter of diamonds) to "Z" (yellow). Colored diamond is a kind of rare and extremely expensive diamond. The color grading system is not suitable for colored diamonds.
7. General grading standard for white diamonds
8. The colors are D, E and F, also known as transparent and colorless, which are extremely precious and rare. The difference between them should be carefully distinguished by experts; The more common color is G to J, which is also called near colorless. It is easy for experts to distinguish, but it is difficult for ordinary people to distinguish, and it is even more difficult to detect if it is embedded in jewelry; The color below k, also called light yellow, may be recognized by ordinary people, but the price is obviously much cheaper.
9. Grade D: the highest grade in diamonds, pure and colorless, flawless, the rarest existence in diamonds, and extremely rare.
10, grade e: high-quality diamonds are colorless and ordinary people can't see the color. Only a few jewelry experts can distinguish colors.
1 1, grade f: high-quality diamonds slightly lower than grade e. Unless you are a jewelry expert, it is difficult to detect color.
Grade 12, G~H: Although it is close to colorless, compared with colorless high-quality diamonds, there is a slight yellowish layer inside.
Grade 13, I~J: it is still close to colorless, but there is also a slight yellow inside, which is valuable.
Grade 14, K~M: most people can see the color clearly, and the color itself is slightly dim, with low grade and poor fire color and gloss.
15. There are many colors of diamonds, such as DEFGHIJKLMNOPQRSTUVWXYZ. Generally, the color of diamond is acceptable as long as it is above H color.
16. At present, most domestic shopping malls are F-J diamonds, and diamonds with high colors such as D and E are rare, and yellow diamonds after K are also rare.