High Accuracy Diamond Tester Selector Gemstone Testing Kit Digital Test Pen Lot

• Digital Diamond Tester– Designed to help distinguish diamonds from common gemstone simulants.
• Thermal Conductivity Testing– Uses a thermal testing probe for gemstone evaluation.
• LED Indicator– Visual indicator helps show the testing result.
• Audio Beep– Audible signal provides additional testing response.
• Metal Warning– Continuous buzzing can indicate contact with metal settings.
• Calibration Control– Built-in calibration meter and volume control for convenient operation.
• Portable & Compact– Suitable for home, workshop, jewelry and on-the-go testing.

1.Turn on the tester and allow the probe to warm up.

2.Adjust the LED level according to the room temperature and stone size.

3.Place the probe tip against the surface of the gemstone at approximately a 90° angle.

4.Observe the LED indicators and listen for the corresponding audio signal.