Many of my friends at the time of purchase jewelry, often hear the "diamond" of the word, meaning probably all know that imitation diamonds. In fact, just rhinestone imitation diamonds collectively, but there are a lot of stones is distinguishable. So-called "diamond" in the end what is it? What's the difference between it and the real diamond have it?
Here everyone is usually seen in the market, "diamond" of the type:
1, Glass: glass ground easily distinguish fake diamond because of its low refractive index, there is no real diamonds that kind of flashing colored lights, a little experienced people at a glance. This "diamond" is often used to compare cheap jewelry. 2, synthetic spinel: it lacks color diamonds flashing light, it is immersed in methylene iodide, and its outline will be blurred. The real diamonds are very clear outline.
3, synthetic sapphire: colorless and transparent synthetic sapphire after pondering also be used as a substitute for diamonds. But it almost disappear in the "diiodomethane" rather dark edge real diamonds, very clear.
4, crystal and topaz: transparent both natural mineral crystals, after pondering the diamond similar, but lack the diamond bright color of fire. And they are "non-homogeneous body", but diamonds are "homogeneous body", with the polarizing instrument easier to distinguish.
5, zircon: Before synthetic cubic zirconia appear, zircon is the best diamond substitutes. 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 observed with a magnifying glass when pondering a good zircon Faceted gemstone, its top surface and the surface can be seen at the bottom of the ridge there is 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, artificial compounds, no natural minerals. Because cubic zirconia in the refractive index, dispersion and other aspects of natural diamonds is very close. But its low hardness (8.5) 1.6-1.7 times the proportion of diamonds, up to 5.6-6, and the thermal conductivity is much lower than the diamond, it can still use the instrument to accurately distinguish it with diamonds.
Now we finally understand the concept of "diamond" of the bar, in addition to "diamond" in the glass easier to distinguish, the other "diamond" is generally the most important thing is to look shiny. In general, under natural light, diamond brilliance is "diamond" imitation incomparable (There are exceptions, such as strontium titanate fake diamonds and Moissanite, even more than the true brilliance of diamonds). Suggest that you buy at the time of routine, to really draw the line, do not buy or not allowed in the testing organization with a certificate of guarantee issued by the professional authority to buy.