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Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones : : Industrial & Scientific

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Diamond Tester,High Accuracy Diamond Tester Pen and Diamond Torch Jewelry Diamond Tester Kit Professional Diamond Selector for Novice and Expert, Thermal Conductivity Meter (Battery Included) : Arts, Crafts & Sewing

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