"Li Gui" in jewelry: Be wary of 7 kinds of counterfeit diamonds
When consumers buy jewelry, the most fear is to buy fakes. It is not terrible to buy expensive. After all, as long as it is a real diamond, it is not a loss. Then, what are the counterfeit goods in the diamond, "Li Gui"? Xiaobian today will introduce the seven kinds of fake diamonds for everyone.
1. Zircon: Zircon was once a diamond substitute. Because it is very similar to diamonds, but zircon has a strong birefringence, it has two different refractive ratios, and the resulting optical phenomenon is very special. When the honed zircon faceted gemstone is observed with a magnifying glass, from the top surface It can be seen that there are significant double shadows on the bottom face and ridgelines. Diamonds have no double shadows because they are "homogeneous."
2, artificial spinel: it is different from diamonds, it lacks the brilliance of enamel. When you put it in diiodomethane, it becomes a bit fuzzy, and the diamond can clearly see its outline.
3. Cubic zirconia: (ie â€œUSSR drillâ€): Cubic zirconia, which has a low hardness and a much lower thermal conductivity than diamonds, can still be accurately distinguished from diamonds by scientific instruments. The most ideal diamond substitute or fake product that was first introduced in the former Soviet Union was an artificial compound. Because cubic zirconia is very close to natural diamonds in terms of refractive index and dispersion. Since the advent of cubic zirconia, it has occupied half of the market for fake diamonds.
4, artificial sapphire: it almost disappears in the diiodomethane is invisible, and the edge of the real diamond is dark, very clear. The colorless and transparent artificial sapphire can also be used as a substitute for diamonds after honing.
5, glass: a white porcelain bowl can be used to hold a bowl of water, the colorless glass products posing as diamonds can not see its outline when it is in the water, and the dark outline of the real diamond is very clear in the water. A fake diamond made of glass is easy to distinguish because it has a low refractive index and does not have the glittering color of a real diamond. A little experienced person knows it at a glance.
6, artificial rutile: rutile whose composition is titanium dioxide, is an ordinary natural mineral, because its refractive index (2.61 - 2.90) is higher than diamond (2.42), so after the jewels can appear bright and dazzling flash, And it can be a rainbow-like change, it is very beautiful. "Colorful diamonds" are too bright and have unclear milky white light, so they have a vulgar feeling, far less elegant and lovely than diamonds. Natural rutile is almost all opaque, so it was first made by American Lead Company in 1947. Artificial rutile, which is used as a diamond substitute or counterfeit, whose colorful flashes exceed the true diamonds, often referred to as "multicolored diamonds" or "five-color diamonds."
7, crystal and topaz: they are all "non-homogeneous", and diamonds are "homogeneous", easy to distinguish with a polarizer. The transparent crystals of these two natural minerals are also a bit like diamonds after honing, but they lack the glittering color of light.
These fake diamonds can be distinguished by the above methods. If you need to buy a diamond friend next time, you can pay attention to it, maybe it will help you.
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