One of the counterfeit identification methods: wrap the hair around the emerald
The most ridiculous thing is to use hair silk wrapped around the jade, burn with a lighter, and immediately break it is a fake, burning is always true. I don't know which rivers and lakes liar to edit, this method seems to be circulated quite a lot. The elementary school natural class said that there is a flame inside the flame. The temperature of the outer flame is much higher than the inner flame, and the hair is tight or loose. A big difference is how many consumers are deceived with such a simple principle. At this time, is there anyone who says that jade has good thermal conductivity? Is there a scientific basis for this method? The thermal conductivity of the jade can't stop the temperature of the outer flame to kill the hair. I don't believe you can try it.
The second part of the fake identification method: the cooler feeling is the true jade
Based on the identification method of jade thermal conductivity, it is also said that jade will be cooler on the hand. In fact, this is a bit of a use of plastic glass, for the rest of the emerald jade or jade B goods, C goods this method is completely unreliable. Another point to note is that cool is our touch. This kind of touch will change due to changes in the temperature of the human hand. It is also insufficient to use cool as the basis for identification.
The third method of counterfeiting identification: the one that can be drawn is the real jade
Many people will tell customers when they sell jadeite. The hardness of jadeite is very high. It is true jade that can touch the glass. Glass is quartz. This should be well known. Quartz has a Mohs hardness of 7 and jadeite has a hardness of 6.5-7. The glass is cryptocrystalline and has the same hardness in each orientation. Jadeite is polycrystalline, and its cleavage surface has poor hardness, so jadeite may be damaged to some extent during the process of sliding glass. There are also many quartz jade or other high-hardness gemstones that can be cut glass, so whether or not the glass can be drawn is not a basis for identification.
The fourth method of counterfeiting identification: the sound of knocking is really jade
Others use jade knocking to judge the true and false. Because the crystal particles of jadeite are denser, the sound will be crisper. The B-car jade has been damaged by acid pickling, and its fiber interweaving structure has been damaged and become loose, so the knocking sound is relatively dull. In fact, as fraud is becoming more and more sophisticated, this method is not so reliable. Now the filling of the B goods has been improved and it is very crisp. There is also a knocking sound that is not only related to density, but also related to stone patterns. The stone-like A-car jade knocking sound is also very dull. And for small beads, ring faces, mosaics, etc., this method is not feasible.
Five of the fake identification method: dripping method
The so-called dripping method means that the water droplets are round and beaded. This is a phenomenon formed by the tension of the smooth surface of the jadeite. A few years ago, the production method of B goods was still relatively backward. There would be obvious acid etching and acid etching pits on the surface of B goods jade. When the water drops drip up, they will not be round beads. However, in recent years, the B-Jadeite will be subjected to secondary polishing. After this process, the acid-etched netting and the acid-etched pit on the surface of the B-Jadeite are all gone under the ten-fold magnifying glass, so the dripping method is completely absent. What scientific justifications.
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