Precision Diamond Tester Pen with Thermal Conductivity Meter Description: Achieve precise and reliable results with the Precision Diamond Tester Pen. Equipped with an advanced thermal conductivity meter and an eco-friendly 9V battery, this tester easily differentiates between diamonds and moissanite. Its compact design and high accuracy make it a valuable tool for jewelers and gem collectors. Ensure the authenticity of your jewelry investments with this indispensable diamond tester pen. Features: Easy operation. LED light and audio result indication. The red light will be showed and the audio indicator will ring if the stone is real diamond. Simple calibration for stones
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