Diamond is a noble and luxurious decoration, inlaid jewelry of natural diamond jewelry is the highest. However, the diamond as scarce and expensive, especially the larger pieces of diamond, it is generally prohibitive. So, with cheap stones, artificial stones or glass to replace or bogus diamonds on the secret and openly, more and more serious business of fake diamonds, are also increasingly prosperous again. Common fake diamonds are as follows: (1) glass: glass ground into the fake diamond is easy to distinguish because of its low refractive index, there is no real color diamond that flashes light, a little experience, who see the answer . In addition, the available white bowl containing a bowl of water, posing as a colorless diamond glass diffuse into the water that is blind to its outline, the outline of the true Dark Diamond in the water is extremely clear. (2) artificial spinel: the difference between it and the diamond is the lack of flashing colored light, it would be immersed in the second iodide will outline vague, but really is very clear outline of the diamond. (3) Crystal and Topaz: the transparency of the two natural mineral crystals, after pondering a bit like a diamond, but they lack color flashing light. And they are "non-homogeneous body," while the diamond is "homogeneous body", easy to distinguish between a polarizing apparatus. (4) Artificial sapphire: colorless transparent synthetic sapphire and figure can be used as a substitute for diamonds. But it "Diiodomethane" almost disappear, while the true edge of Dark Diamond, is very clear. (5) Zircon: in before the appearance of man-made cubic zirconia, zircon is the best diamond substitute. Zircon has a strong birefringence, that is, it has two refractive index and refractive index difference between the two larger. The resulting a very special optical phenomena, when observed with a magnifying glass prism surface Sato good zircon stones, can be seen from its top surface and bottom of the double ridge obvious impact. The Diamond as a "homogeneous body", no dual-video phenomenon. (6) Artificial Rutile: Rutile is a common natural mineral composition it is titanium dioxide, due to its refractive index (2.61-2.90) than diamond (2.42) is even higher, so refined gems can appear bright and dazzling flash, and can change the rainbow appears, it is very beautiful. Unfortunately, almost all the natural rutile is opaque, so 1947 was approved by the U.S. company's first system lead the industry out of synthetic rutile. Colorless diamonds which are used as substitutes or fake goods, the colorful flash than real diamonds, often called the "five diamond" or "colored diamond." However, a strong refractive index of rutile, zircon and hence, like, can use a magnifying glass to see the bottom of the ridge from the top of the significant double impact, so easy to distinguish with diamonds. In addition, the "five diamond" because of flash too bright and clear with no milky white light, so there is a sense of vulgarity, far less elegant and lovely sparkling diamonds. (7) Cubic Zirconia: (that is, "the Soviet Union Diamond"): This is the first former Soviet Union launched the best diamond substitute goods or pretending it is man-made compounds, no natural minerals. Since the advent of cubic zirconia, and other various man-made gem materials, only used as a substitute for other middle and low precious stones, not diamonds a counterfeiting mill again. This is because cubic zirconia in the refractive index, dispersion and so very close to natural diamonds. But its hardness is low (8.5), the proportion of the diamonds 1.6-1.7 times, up to 5.6-6, and the thermal conductivity much lower than the diamond, it can still be accurate instruments and diamond separate.
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