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Learn to Use a Refractometer (Video) - International Gem Society
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gemsociety.org
Gemological Refractometer is your primary and most powerful tool in gemstone identification which helps a Gemologist to determine / measure the Refractive Index of faceted Gemstones in order to identify the variety of the gemstone being tested. Accordingly, you can easily identify whether your gemstone is a Sapphire, Spinel, Synthetic Spinel, Garnet, Chrysoberyl, Quartz, Ruby,Cat's eye, and so on. Featured below is a high quality, most durable & light weighted student grade gem refractometer off
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