After-Sales Service: 30-day unconditional return or exchange. For any issues or battery replacement (same type available in the U.S.), please contact us
【Fast & Accurate Diamond Verification】The high-accuracy diamond tester pen has advanced thermal conductivity; this tester accurately distinguishes real diamonds from common fakes like crystal or cubic zirconia. Ideal for home use, collectors, or resellers
【Built-in UV Light for Fluorescence Detection】Diamond tester professional features a built-in UV light to reveal diamond fluorescence—an important clue in verifying authenticity. Different materials show different reactions under UV, making this feature useful for deeper assessment
【Real-Time Feedback with LED Lights & Sounds】After a 25-second warm-up, hold the conductive panel on the top with your finger, tip the vertical diamond 90 degrees: a red LED flashes and a buzzer sounds when a real diamond is detected
【Testing Tips for Best Accuracy】✦ Use with bare hands (avoid gloves)✦ Best results at room temperature (10–35°C)✦ Accurate for diamonds 0.02 carats and larger
【Compact & Ready for Travel】Diamond tester pen compact size with protective case makes it easy to keep in your bag or drawer, leather pouch keeps your tester safe— perfect for on-the-spot diamond checks at home, in stores, or while traveling.
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