The gems to be tested must be clean, dry, and at room temperature. 1 X Diamond Tester. The red light will be showed and the audio indicator will ring if the stone is real diamond. Highly compact design, which can perform fast, accurate, and safe diamond testing, which is very suitable for carrying with you when buying diamonds.
Jeweler diamond tool kit : Portable Diamond Tester - 60X Illuminated L
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Jeweler diamond tool kit : Portable Diamond Tester - 60X Illuminated L
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