As for the species of jade, we often hear about glass, ice, alfalfa, hibiscus and bean species, which are divided according to the size of the mineral crystal particles inside the jadeite. There is also a division that is distinguished by the density, hardness, and degree of crystallinity of the mineral crystals within the jadeite, namely, old species, new species, and new and old species. How to distinguish between old and new? The new species of jade, the material structure is loose, like winter melon or radish, the background color is mostly white, gray, light green, etc.; and the old jade, even if the head is poor, the structure is still close, like the human abdominal muscles. The difference between new and old is mainly observed from four angles: 1. Cotton: The old cotton has little or fine dots; the new cotton has many kinds of impurities, accompanied by ice slag. 2. Glue: The old species looks very transparent, but the interior is covered with a “gel†(these “gels†blend with the jadeite and evenly distributed); the new species do not. 3. Grayscale: Generally speaking, the old one with a good head is a bit gray. If the water is good and the old one is not gray, the price is very expensive; the new species usually does not. 4. Fluorescence: Good water, old jade, can see a soft and restrained light inside; new species will not. â–¡ species and water often combined to see The species and water of jadeite are not separated. Generally speaking, if the jade is well planted, the water head is good. Of course, if the species is not good, the water head can be very good. However, not all kinds of good jade, the water head is good. For example, some jadeite crystal particles are very fine, but the crystals are not well bonded to the crystals, and the cement is not tight, which affects the light, so the overall appearance of poor light transmission, then the water head is not good. [Teach you to speak in the jargon: "Looking at the inside, seeing the outsider" Experts value the species of jade. A good kind of jade, from the appearance, the gloss is translucent, the color is even, and the fluorescence appears, as if it is spiritual. The layman pays more attention to the color of the jade. The pursuit of green jade, regardless of the quality of the jade. In fact, the colored jade, the kind of jade, looks dry, not spiritual, and will get tired when worn for a long time. â–¡ Kind of old PK species, who should I buy? The old jadeite means that it has an early mineralization age, water head, high density, good durability and strong abrasion resistance. The new jadeite has not been weathered, has no leather shell, and has no fog layer. Therefore, the water head is short, the density is small, the durability is poor, the wear resistance is weak, and it is easy to change, that is, the water head becomes "dry" and even beyond recognition. At first glance, the old jade is better than the new one. However, the old jade has good and bad points. Some have only experienced weathering once, the color is not rich enough; some of the particles are thicker, the texture is not delicate enough, often showing insufficient water; some green blues are too heavy or yellow is not enough; some cotton willows, too many cracks, etc. . Therefore, Jia Jia tells you that the old jadeites are not necessarily good, and some are better than the new ones. However, this also means that good old jade is more precious and harder to find, and the availability rate is as high as 75% compared with the new species. [Understanding the misunderstanding: the old pit is the old one, the new pit is the new one] this is not right. Jade is divided into secondary mines (old pits) and primary mines (new pits). The old pits often have high-quality jadeite production. These jadeite water heads are fine, the texture is fine, the specific gravity is heavy, and the crystal grains are small. Therefore, it is called the old pit species; and the new pit is not very powerful, and the total defective product is called new. Pit species. But in fact, the old pit and the new pit are only a definition of their geographical and geographical distribution of minerals, and it cannot be said that the quality of the jade produced by it must be good or bad. New pits will also have high-quality jadeites. Although they are not many, they can also be called old pits. To be frank, the old pit is almost no longer producing jade, and the so-called "old pits" circulating in the market are basically from the new pit. Unless the jade of the old pit is still circulating in the market, most of them are secretly hidden by private collectors. ã€purchase guide】 Looking directly at the surface of the jade, you can feel that its cotton is very lively, the rigidity is very strong, and the metallic feeling is very obvious (before observing, scratch the surface with a nail to see if it has been waxed). Then use a strong light flashlight to directly shoot the surface of the jade, make it light, observe whether its base is clean, and whether the gray scale is too high (note whether the jade has used polishing powder, observe the surface of the jade back, see if there is staining or observe with a magnifying glass Whether there are fine particles). Then tap the jade lightly, the more crisp the sound, the older the species. Of course, all of this is based on the fact that this jadeite is based on natural A goods. Otherwise, it is B and C goods that you don't have to buy. PS: This method should not be expected to take effect once, it is recommended that buyers pay more to observe and purchase less. If you don't understand it, refer to the certificate issued by the authority and re-examine it if necessary. Sofa Upholstery,Upholstery Fabric,Sofa Fabric Material,Sofa Upholstery Fabric Tongxiang Luchang Textile CO.,LTD , https://www.luchangtextile.com