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The Digital Gem Refractometer 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.
Refractive Index of Some Gemstone:
Quartz: 1.544-1.558 RI
Topaz: 1.63-1.64 RI
Ruby: 1.74-1.78 RI
Cubic Zirconia (CZ): 2.15-2.18 RI
Diamond: 2.37-2.46 RI
Specification:
RI Test Range:1.30 to 2.99RI
Power Input: 9V Battery
Accuracy: +/-0.01 RI
Work Tempreature: 25-28ºC
Standard delivery:
Digital refractometer: 1pcs
Clean cloth: 1pcs
Standard stone sample (1.4875 RI): 1pcs
Standard stone sample (1.7552RI): 1pcs
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