One is between Baitian Huangshi and Huangtian Huangshi, with the muscle quality of Baitian Huangshi outside and the quality of Huangtian Huangshi inside. Most of Baitian Yellowstone Park has a yellow heart. If there are many yellow hearts, it belongs to gold-covered silver. The other is Yellowstone, a white field.
2. "Gold Covered with Silver" Tian Huangshi
There is a kind of "gold covered with silver" Tian Huangshi, which is extremely rare. Texture is also an important aspect that determines the value of Tian Huangshi. The texture of radish is obvious, and the price of Tian Huangshi with fine and neat cut texture is higher, which is why the sayings of "no field without skin" and "no field without grid" come from this.
3. "Double Skin" Tian Huangshi
Tian Huangshi has a double skin, some crows have a thin yellow skin, and some crows have a translucent white skin. Most of these two kinds of double-skin fields belong to loquat yellow field Huangshi. The outer cortex is fine, the inner cortex is evenly distributed, and the muscle mass is pure, even frozen.
4. "Single Skin" Tian Huangshi
The colors of single-skin field Yellowstone are yellow, white, black and green, and the colors are thick and light. Some are unified as a whole, some are different on both sides, some are combined in blocks, and the texture is good and bad. Those whose skin color is as pure as yellow teeth have extremely pure and excellent texture, which is called Huangtian Huangshi. Yellow and grayish green, slightly hard and dark in color; Black is slightly green, the skin is even, and it is also of high quality;
5, "Radish Pattern" Tian Huangshi
Tianhuang grain should have radish grain, which can be seen under the light perspective. Like the texture of the inner layer of radish skin, it is reticulate and has long eyes, from dense to sparse. Like zongzi granules, such as glutinous rice dumplings, steamed rice grains look amorphous and sometimes striped. The mesh is round and scattered intermittently.
Baidu Encyclopedia-Tian Huangshi