By accurately measuring the quantity of light reflected through the gemstone, Presidium Refractive Index Meter (PRIM) is able to differentiate between diamonds, moissanites and other colored gemstones via their Refractive Index (R.I.).
Unlike a traditional refractometer, PRIM measures the range of R.I. value from 1.000 to ~3.000, covering most commonly known gemstones in the market, including diamond and moissanite. In additional, a fast and easy test can be done, without the inconvenience of R.I. liquid.
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