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Reply To: Gem Testing In Jewelry

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There are a couple of things that you can use with gemstones that are set.

If its high enough in a rub-over setting / bezel set you can use a refractometer.

Its always easier if the stone is not in a closed backed setting.

You can use a spectroscope, dichroscope, microscope and the UV light. to a lesser extent you can use the the polariscope, but thats all you might have at your disposal anyway.

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