Jade raw materials can be divided into two types according to their production: 1. Xinshan material: refers to the jadeite produced in the original rock of the mountain. Because it is directly mined from the mine, there is no outer shell. To identify the true and false, it can be judged by observing whether the fracture of the fresh surface of the rock is staggered, and whether there is a flake flash of jadeite crystal (ie, "fly" in Yunnan). 2, Laoshan material: also known as the material, refers to the long-term weathering, and then collapsed and carried to the jade gravel in the river valley or riverbed gravel. Most of the sales in the market before the boring are Laoshan materials, and there is a layer of skin that is formed by the outside world. There are skins and shells inside and outside, and the quality of the interior jade is difficult to speculate, so the experts said that buying the materials is a gambling. In fact, the jadeite expert has a wealth of experience in speculating the internal jade from the characteristics of the observation skin. Therefore, when purchasing materials, it is important to observe the sturdy skin. A. The shape and characteristics of the outer skin can be divided into the following cases: 1 rough skin: the skin is yellow, earthy yellow, beige, brownish yellow and yellowish white. The skin is thick and thick, and the granular structure of the mineral can be seen. The jargon is called the upper son and the new pit. This material has low transparency and low hardness. 2 fine skin: leather is reddish brown, black or black red. Some are like smoke oil, some are like chestnut skin, some are like red dates, and some are like bark. Although there are light colors, they are mostly dark. The epidermis is smooth, such as pebbles and skin. It is solid and has a thin layer of red near the inside of the skin. The internal jade of this skin has fine texture, good transparency and hardness, and is also called a new pit. 3 Shapi: The fine skin of the sand is called the sand skin. Its characteristics are between the rough skin and the fine skin, also known as the new old pit. The quality of the internal jade material of this skin varies greatly. 4 fake skin: Because the quality of jade in the fine skin is better, some people put a layer of fine brownish red skin on the lesser skin. The identification method is to carefully observe the thickness of the skin of the material, to see if the color is very uniform, and whether the skin is smooth and free of cracks. If it is fake skin, tap it on the skin, and the peeled skin will fall off (the natural leather is not broken into pieces and powdered off). 5 Dyed skin: Some people dyed the whole material with skin, and then faded after dyeing, so there is no difference between the outer skin and the outer skin of natural. Identification method: See if the seller opens the door in many places, and the color of each door is similar. If the color of many pieces of the piece is the same, there is suspicion of fraud; then step into the door carefully. See if there are traces of staining. B. The distribution of green on the outer skin, the observation of the green on the outer skin needs to remember three jargon: 1 Ning buys a dollar, does not buy a piece, thinks that the inner green is distributed in strips on the emerald ground. If there are green lines or green clusters on the outer skin, it means there may be green jade inside, if the green is broken on the outer skin. Product distribution · The possibility of green jade inside is small. 2 Buying ten drums in Suining, don't buy a ridge. “The gongs and drums†is the green highlights, and the “ridges†are green at the most prominent part of the jade's skin. Many jade's green color is only on the epidermis. If it is no longer able to travel, it will soon disappear into the jadeite. 3 ̈ 屎 å¼ é«˜ 高 高 高 。 ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡ ç¿¡The leather shell, which often has high green jade. C, the distribution of 外 on the skin: In general, the jade is less and the better, the larger the jade is, the better. If there is a joint between the ends of the rind, the cleft Inevitably through the entire jade, it can only be used as two small materials. D. “Fog†under the outer skin: “Fog†under the skin of the material, there are various colors, such as black gold, white, yellow, black, dark red and so on. The "fog" color is related to the quality of jadeite. The better jade, its "fog" is black gold. Followed by "white fog", this jade jade species is generally old. Then the water is yellow and yellow, and the last is black fog, cow blood fog and dark red fog. Black fog and Wujin fog are easily confused, difficult to identify, and easy to cause losses in business. E. Open the door and the fake door: Because the jadeite is wrapped in the outer skin, it is difficult to judge the quality of its internal quality. In order to observe and speculate on the quality of the interior of the jadeite, it is often necessary to cut a hole in the rind of the granules. The jargon is called “opening the window†or “opening the door.†However, the opening of the door also has a fake, called a fake door, and has Reach the point of realism. E.g: 1 Hollow the high-green part of a high-green jade plot center, leaving only some emerald green on the outer skin, filling in the inferior jade pieces into the hollowed out, and opening the window in a thin layer of high green emerald. 2 Drill one to several holes in the transparent jadeite material, drill the hole to the skin near the other end, fill the hole with green paint or green filling, and then use the sediment to block the hole. The window at the top of the head opens, and the window is green, making people happy and easy to be fooled. 3 Open the window on the inferior jadeite material, apply the emerald green dye to the window, and cut a jadeite sheet with good transparency but poor color, paste it on it, and then polish it and add fake skin. In the above several kinds of falsification, it is often necessary to affix fake leather, and the bonding seam is not easy to hide, as long as it is carefully observed, it can be recognized.
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