Portable Thermal Conductivity Meter Drill Pen High Accuracy Diamond Gem Detector Diamond Tester Professional Jewelry Tester,Detection And Identificati

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Function: The jewelry tester is designed for fast, accurate and safe diamond testing. It is a portable electronic tool used to distinguish real and

Portable Thermal Conductivity Meter Drill Pen High Accuracy Diamond Gem Detector Diamond Tester Professional Jewelry Tester,Detection and

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