Since the shape of the jadeite jade skin is very important to the jadeite, the experienced jade man can estimate the intrinsic quality by observing the outer skin of the jadeite stone. When selecting and observing the jade stone, it is based on the multi-faceted observation of the jadeite. And thinking, collectively referred to as: "phase jade."
First of all, make a judgment on the epidermis of jade. What is Xiangyu? "Xiang Yuxue" is a kind of sand hair shell, endogenous fog, jade meat color, fault and factory mouth of jade jade that was invented by Chinese people with Yunnan jade and jade in the past five hundred years. The difference between the judgement of the merits and demerits, at this point, the jade merchants in Yunnan united and made outstanding knowledge contributions to the jade world. These valuable experiences, in the conservative old society, are only passed down by the single pass and guarded against rumors.
On the epidermis of jade raw materials, see the regular or directional arrangement of weathered and semi-weathered sand with the same or deep or light color as the epidermis, indicating the directional dynamic deterioration of the original stone. The co-strong influence of hydrothermal alteration has the potential to cause chromium to be released and green. The jade skin is formed by the weathering of jadeite materials during the evolution process. We actually concluded that the color of the jade skin is: black, gray, yellow, brown, light yellow, white and other colors.
The formation of the color of the skin is a combination of two geological processes, that is, the external oxidation of the jade causes the iron hydroxide to penetrate into the fine micro-cracks of the jade skin and then interact with the impurity elements being oxidized under the epidermis. According to the color, compactness, smoothness and convexity and concavity of the skin, it is possible to estimate the color inside the jadeite material, the quality of the head, the quality of the land, the number of old and tender, and the number of cracks.
If the skin is dense and fine, it usually shows less transparency and less internal impurities.
The surface of the skin appears as an inconspicuous moss, often reflecting the possibility of greening within it.
The leather surface is uneven and rough, showing that it has many internal cracks, loose texture and poor water.
No matter how great the color changes on the jade skin, and there are strips of plaques such as black cockroaches, there should be a possibility of green.
Black sable sand contains a lot of impurities such as iron, even if it has green inside, most of it is blueish green.
After the yellow white sand is applied to the water, there is a feeling of fine sand falling off, and the general water head is sufficient.
The brown skin is called the yellow sable, and the general species is very old. If the skin is tender and sees mossy and black bands, it is obvious that there may be high citrus in the water.
Where there is a umbilical cord, there is not necessarily a green color. It is necessary to have a "song flower" to indicate that there may be green inside.
The jade skin is faintly visible like some dried mossy patches, and the plaques and strips are called "pine flowers."
The scales indicate that "the species" is old.
The belts are generally parallel to the green direction, and the green to the "pulse" or green shape, mostly the primary cracks filled with chromium ions and color.
According to the depth, shape, direction, amount and density of the pine flower color, the depth, direction, size and shape of the green color can be inferred. When observing, it is necessary to study the raw materials on the raw materials.
Jade's skin and finished product judgments also have the same point, so remind you that gambling stones should be cautious, gambling up a jade, and getting rich overnight, but the vast majority ended in failure. Gambling stones have high risks and require comprehensive judgment and rich experience to make their own evaluations. But this is a precious treasure of a long history of mysterious culture and history!
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