For example, serpentine jade in Jiuquan and serpentine jade in North Korea belong to Xiuyu. The southern jade produced in Guangdong is mainly composed of serpentine, and the formal appraisal certificate can only be called serpentine jade, not southern jade.
Generally speaking, jadeite can be divided into two categories. The first kind is called old jade, which is a kind of precious jade. Its color is light and yellowish. The second kind is called Xiuyan Jasper, like Hetian Jasper, which is all green. Among Xiuyan jasper, green, dark green, good permeability and flawless jasper can be said to be more precious.
Extended data:
The rank of xiuyu
1, super emerald is dark green. The jadeite of this color is waxy in appearance, which may be a little old at first, but it will become smoother and more oily after a long time. In addition, this kind of jade has good transparency, no impurities and cracks in its internal components, and smooth and delicate texture.
The first-class jade is green. Although this kind of jade is smooth and oily, it is still slightly worse than super-grade jade.
3. The second-class jade is yellow-green or some other colors, and the distribution is relatively uniform. Most of this jade is translucent to slightly transparent, with a waxy substance on the outside, but its internal composition contains a small amount of impurities.
Fourth, third-class is that some colors are unevenly distributed. This kind of jade is glassy and slightly transparent. Although there is no crack, its internal composition also contains obvious impurities.
References:
Baidu Encyclopedia-xiuyan jade