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Reply To: Digital Refractometers

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gemsbymark
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Even GIA only requires the same type of refractometer that’s been used since the 1880s. They are just in newer cases these days and you really should learn to use it, to see shade cutoffs and learn to calculate birefringence. High tech toys are nice…but the industry standard is the standard RI Liquid and Hemi cylinder Refractometer. Good luck with your tests.


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