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Specifications
Gem refractometer,digital refractometerNo need refractive index liquid
refractometer for gem testing
Digital refractometer for gem testing
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.
Specification:
RI Test Range:1.30 to 2.99RI
Power Input: 9V Battery
Work Tempreature: 25-28oC
Dual purpose for refraction and reflection, digital display
Needless refractive index liquid
Wide testing range: 1.30-2.99
Digital circuit design, unaffected by ambient light, stable testing data
Data error <=0.008
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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