| Place of Origin: | Fujian China | Brand Name: | Sinotech | Model Number: | GDR800 |
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The Digital Gem Refractometer GDR800 is a nice optical instrument which will give a reading of the refractive index of a clean, flat, well-polished facet to reproducibility of 0.007RI index units. With covering the full range from 1.30 to 2.99RI, It is an ideal instrument to identify the gem stones. The importance is that it can test the gem stones without requiring ANY messy, damaging contact oil.
Specification:
RI Test Range:1.30 to 2.99RI
Power Input: 9V Battery
Work Tempreature: 25-28oC
Refractive Index of Some Gemstone
Quartz: 1.544-1.558RI
Topaz: 1.63-1.64RI
Ruby: 1.74-1.78RI
Cubic Zirconia : 2.15-2.18RI
Diamond: 2.37-2.46RI
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