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Help CenterDigital Gemological Refractometer (FGR-DA)
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Specifications
gemological refractometer,digital gem refractometerNo need refractive index liquid
Wide testing range: 1.30-2.99
Digital Gemological Refractometer (FGR-DA)
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Description |
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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. |
Specification
Dual purpose for refractive index and reflectivity,
Digital display
Oilless test: don’t need the refractive lndex liquid
Wide testing range: 1.30-2.99;
Digital circuit design, unaffected by ambient light, stable testing data
Error: less than or equal to 0.008
Power:9V battery;working temperature:10-28 degree
include
1.Clean sample
2.Clean test platform
3.Place sample
4.Adjust center position
5.Press Test Button and Read index value
6.Adjust sample positions and get correct index
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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