The grades of jadeite are as follows: At present, jadeite is the only jadeite found in the world, so jadeite is also called jadeite. There are four levels of ABCD.

Nephrite standard:

1, color: white is the best, and suet jade is the best. Other colors are also good. Topaz and purple jade are rich in color, while jet is rich in ink. The color of jadeite is transparent.

2. Type: Hetian jade is the best, and other jade species also have good products.

3. History: Ancient jade is the best. Regarding the classification standard of ancient jade, some people think that jade in the Republic of China is ancient jade, while others think that jade before Han Dynasty is ancient jade. My humble opinion: It is better to classify jade before Ming Dynasty as ancient jade.

Extended data:

Regarding the concept of jade, jade in a broad sense should have three characteristics:

First, the material meets the requirements of "beautiful stone";

Second, it has the basic style of typical jade in modeling;

Third, jade articles must be made by special jade-making methods, such as grinding and drilling, rather than ordinary stone-making techniques. Furthermore, the jade articles studied should have a certain historical age, and their historical and cultural values must be emphasized.

Baidu encyclopedia-jade