Scam one: entangle the hair in the emerald on the fire
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.
Scam 2: The feeling is cooler, it is really 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 also change due to changes in the temperature of the human hand. It is also insufficient to use the cold as the basis for identification.
Scam 3: You can draw a glass of true jade
When I sell a jadeite, many of my salesmen will tell the customer that the hardness of the jade is very high. The one that can touch the glass is the real jade. 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 scratched, so whether or not you can draw glass can not be used as a basis for identification.
Scam 4: The sound of the percussion is really jade
There are also some guests who use jade knocking to judge the true and false. Because the crystal particles of jadeite are denser, the percussion is less affected by the propagation of sound waves, and the sound becomes 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, with the development of fraud, the scientific nature of 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.
Scam 5: dripping method
I have also heard of the dripping method, saying that it is a cargo jade that is water droplets. This is a phenomenon formed by the tension of the smooth surface of the jadeite. Since the production method of B goods is still relatively backward a few years ago, there will be obvious acid etching and acid etching pits on the surface of the B-car jade. When the water drops are dripped, they will not be rounded. However, in recent years, the B-Jadeite jade will be subjected to secondary polishing. After this process, the acid-etched netting and acid-etched pits on the surface of the B-Jadeite jade are gone under the ten-fold magnifying glass, so the dripping method is completely absent. What scientific justifications to support.
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