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.
Size of Diamond Stone Testers: The gemstone tester pen diamond gold tester has size about 6.6 inches length and width about 1.6 inches with thickness
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This diamond tester has a highly compact design, which can perform fast, accurate, and safe diamond testing. Type: Diamond Tester. Turn on the power
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