Identification of the diamond tool

A diamond single refraction
Diamond single refraction is due to the nature of the diamond characteristics of the decision. While other natural stones or artificial gems are mostly double refraction in nature. Fake  cbn grinding wheel diamond under a 10x magnifying glass from the front, slightly oblique perspective, it is easy to see that angular lines overlapping images, and also showing the two bottom light. Birefringence small differences such as zircon, etc., can also be seen that light at the end of overlapping images.
2, the diamond adsorption
Grease and dirt diamond has a certain affinity, the oil is easily adsorbed diamond. Therefore, the diamond will feel with your fingers stroked tackiness, fingers seem to have slimy feeling. This is not any gems. This approach needs to be trained can only master concrete ring saw  one subtle difference.
3, the characteristic straight line
Diamond polishing the surface is very smooth. With a pen dipped in ink across the diamond, if real diamonds, leaving the surface is a smooth and continuous lines, characterized by straight line. Counterfeit goods leaving behind a small dots lines. This method should be observed with a magnifying glass.
4, the unique adamantine luster
Roughly 100 degrees incandescent light, a good diamond cutting and grinding are compared with counterfeit table saw blades  goods, it is easy to see which has the adamantine luster. This method should not be too dark or too strong in the light is conducted.