Property |
natural diamonds |
Lab-grown diamonds |
Chemical composition |
C |
C |
Refractive index |
2.42 |
2.42 |
Relative density |
3.52 |
3.52 |
Dispersion |
0.044 |
0.044 |
Hardness |
90GPA |
90GPA |
Thermal conductivity |
2X103 W/M/K |
2X103 W/M/K |
Thermal expansion |
0.8X10-6 K |
0.8X10-6 K |
Transmittance |
DEEP UV TO FAR TR |
DEEP UV TO FAR TR |
resistivity |
1016 OHM-CM |
1016 OHM-CM |
Shrinkage |
8.3X10-13 M2/N |
8.3X10-13 M2/N |
Usually, we do not worry about the quality of big diamond, because the certificate (for example: GIA) can guarantee quality. But when you purchase small diamonds normally with no certificate, how to distinguish the natural diamond and the synthesis diamond? Our diamond luminous imaging system can solve your confusion.
There are two synthetic diamonds (HPHT and CVD) on the market now. Synthetic diamonds were just made in the laboratory instead of being naturally grown and are relatively cheap. They are the same regardless of hardness or refractive index. There is no macroscopic difference between the two diamonds so that it's very common now for natural diamonds to be sold mixed with synthetic diamonds, and then interests of the customers may be damaged by the difficulty in distinguishing between diamonds. At present, many machines for testing diamonds on the market can only test diamonds one by one, which very waste time. In summary, that is why we developed EzView Series diamond check machine. Our product can do batch inspection, detecting hundreds and thousands of diamonds in the same time, can get results during 6-7 seconds, which is very efficient. This is the uniqueness of this machine, leading the world in design.
Hotline: +86-25-87763312 Email: sales@diamondchecking.com Skype: +86 17895009655 WhatsApp:+86 17372266143
Add: No.7 Jinxiu Street, Nanjing City, Jiangsu Province, China
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