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What are the characteristics of imitation jade glass

A few days ago a brother brought a bracelet to let me see, I experience it with fake van cleef mother of pearl earrings glass texture. He said: 'No, when I bought, I did an experiment on the glass and I could make a mark on it.' Then, he scratched the glass on my desk, and I touched it with my hand Mark, really a bit astringent.

I informed him that some of the glass hardness can be achieved above 7 Mohs, you can cut through the glass, and now to find out only the basis for determining, not a very simple matter. In the side of the transmitted light irradiation, I finally found a small bubble in the bracelet. After another test, I informed my brother, this is indeed a glass frit. Which is used to characterize the general glass inspection marks, is still one of the few visual methods. Together, pay attention to look at the polished surface to be checked jade rupture bubbles pits. Because firing, there will always be some bubbles randomly scattered in the utensil appearance of the position, when it is worn away some, the remaining some as hemispherical dimples on the polished surface.

2, to find ways to find 'shell-shaped fracture.' Because of the great brittle glass, it is easy to crack, just pay attention to careful investigation, and sometimes can find subtle fracture. For example, around the hole in a tether, the fringe angle is less than 90 degrees and the sharp edge of the glass imitation jade often appear. Also pay attention to investigate the fracture surface is not showing a shiny glass

3, carefully examine the appearance of the sample. Because some glass imitations are made using compression molding technology, all the flutes are relatively slippery. Then the high-temperature viscous melt cools and shrinks, sometimes showing some depressions in the plane. There are traces of molding that are not fake van cleef alhambra earrings polished and polished easily.

4, to determine the sample thermal conductivity and thermal conductivity. Hetian jade has a feature of 'thermal stability' high, or called 'temperature' is good, that is, its own relatively stable state at room temperature, external temperature has little effect on it. The low thermal conductivity of glass, when it touches people's skin, people quickly feel it has a sense of warmth. Just picked up the sample, if not the slightest sense of cool, there is the glass may be.

5, 掂 heavy law. That is to be examined jade gently toss, van cleef earrings ebay replica carefully understand it impact on your palm. This method also requires a long history of accumulation.

Use the sensory experience to identify the authenticity of jade, its accuracy is proportional to the number of practical experience, hard to convey. Therefore, only the sensory experience to identify the authenticity of jade, both its convenience, but also its limitations, must not be content with half-hearted will jump to conclusions. The best way is still to get to determine the equipment is complete, advanced, judging staff experienced jade jewelry judging body to do the inspection.

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