Do you know about the jade knowledge of the skin? Most of the jadeite raw materials are skinned, even if it is a special jadeite.
The formation process of jade skin is more complicated. Mainly the jade raw materials are formed by weathering during the handling process. The jade skin is rich in color, such as black, gray, yellow, brown, light yellow, white and so on. So how is the color of the skin formed? The combination of the two geological processes forms the color of the jade skin. In other words, the external oxidation of the jade causes the iron hydroxide to penetrate into the fine micro-cracks on the surface of the jade skin, and then interacts with the impurity elements being oxidized under the epidermis.
Many experts can roughly estimate the color of the jadeite material, the quality of the head, the quality of the land, the age of the seed and the number of cracks according to the color, compactness, smoothness and convexity and concavity of the skin.
For example, if the skin is characterized by compactness and fineness, then normally, it means that the internal transparency is better and the impurities are less. If the surface of the skin appears to be inconspicuous, it often reflects the presence of green inside. And some uneven leather surface means that it has many internal cracks, loose texture and short water head. For example, if there is a band of plaques with a large change in color on the jade skin, such as black cockroaches, it should be noted that green color may appear.
After the yellow white sand is applied to the water, there is a feeling, and the fine sand falls off, and the water head will generally be sufficient. Some brown skins are called sassafras, and the general germplasm is very old. If the skin is delicate and smooth, and you can see the moss and black strips, then the water head is long and it is likely to have high green. The skin of the jade is a complex concept, and it is necessary to comprehensively judge the situation inside.
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