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Presidium Refractive Index Meter II (PRIM II)
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A useful portable desktop instrument that instantly identifies diamonds, moissanites and colored gemstones based on their Refractive Index.

By accurately measuring the quantity of light reflected through the stone, Presidium Refractive Index Meter II (PRIM II) is able to separate diamonds, moissanites and other colored gemstones via its Refractive Index (RI) on flat surfaces of polished gemstones.

Unlike a traditional refractometer, PRIM II is able to measure the range of RI value from 1.000 to ~3.000, therefore covering the commonly known gemstones in the market, including diamonds and moissanites. In addition, a fast and easy test can be done, without the inconvenience and messy usage of RI liquid.

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Presidium Instruments Pte Ltd

Presidium is a trusted brand for diamond and gemstone testing devices since 1979, that designs and manufactures a wide range of portable gemmological devices through its owned-facilities, for the global gems and jewellery industry.

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