1, Glass: glass ground into a fake diamond easily distinguished because of its low refractive index, there is no real diamonds that kind of flashing colored lights, a little experienced people see at a glance. This "diamond" is often used to compare cheap jewelry.
2, synthetic spinel: it lacks a diamond of flashing colored lights, it was immersed in diiodomethane, its outline will be blurred. The real diamonds are very clear outline.
3, synthetic sapphire: colorless transparent synthetic sapphire after pondering also be used as a substitute for diamonds. But it almost disappear in the "diiodomethane," while the edge of real diamonds Dark, very clear.
4, crystal and topaz: transparent two natural mineral crystals, after pondering the diamond are similar, but lack diamond bright color of fire. And they are "non-homogeneous body", while the diamond is "homogeneous body", with the polarization analyzer easier to distinguish.
5, zircon: Before artificial cubic zirconia appear, zircon is the best diamond substitute. Zircon has a strong birefringence, i.e., it has two refractive index, and the refractive index and the large difference between the two. Resulting a very special optical phenomena, when observed with a magnifying glass pondering good zircon Faceted stones, it can be seen from its surface and the top surface of the ridge at the bottom of a clear double shadow. The diamond because it is "homogeneous body", no double image phenomenon.
6, cubic zirconia (ie, "the Soviet Union Diamond"): This is the first of the former Soviet Union launched the best diamond substitutes or bogus products, man-made compound, no natural minerals. Because cubic zirconia in refractive index, dispersion and other aspects of natural diamonds is very close. But its low hardness (8.5) specific gravity of 1.6-1.7 times the diamonds of 5.6-6, and the thermal conductivity is much lower than diamond, it can still be used with the instrument to accurately distinguish the diamond.
Now we finally understand the concept of "diamond" of the bar, in addition to "diamond" in the glass relatively easy to distinguish, the other "Rhinestone" in general the most important thing to look shiny. In general, under natural light, diamond brilliance is the "diamond" imitation incomparable (There are exceptions, such as strontium titanate fake diamonds and Moissanite, even more than the true brilliance of diamonds). I suggest that you, in the daily purchase, are not allowed to really draw the line, do not buy or security testing organization under certificate issued by the authority with a professional before you buy.
