High Accuracy Professional Diamond Tester Pen with 365nm UV Light & Thermal Sensor – Fast 0.5s Detection,Diamond Tester, Professional Jewelers' Gemstone Detector (Diamond Tester Pen)

High Accuracy Professional Diamond Tester Pen with 365nm UV Light & Thermal Sensor – Fast 0.5s Detection,Diamond Tester, Professional Jewelers' Gemstone Detector,Novice and Expert Jeweler Tool How To Test Diamond： 1. Remove the pen cap 2. Press the power switch and slide it to the "diamond" position. The red light POWER will light up and the tester will start preheating 3. Preheat for 25 seconds, the green light READY will light up, the tester is ready and you can start testing 4. The conductive metal plate on the side must be touched during the test 5. Keep the test pen vertical to the diamond 6.Real diamonds will light up a red LED and make a clear sound Fake diamonds will light up a green or yellow LED and will not make a clear sound 7. Slide the switch on the tester to the "ultraviolet" position . Real diamonds usually have blue fluorescence 8. Note: The probe can only touch the diamond gemstone, not metal or skin, to avoid false results How do I ensure I get the most accurate results every time? Follow 3 steps: 1. Touch the metal plate with bare fingers. 2. Hold the probe at a 90° angle to the stone. 3. Use in standard indoor temps (50°F–95°F). These tips ensure professional-level precision and prevent inconclusive readings. Can this tester distinguish between natural and lab-grown diamonds? No. Because lab-grown diamonds (CVD/HPHT) share identical physical and thermal properties with natural diamonds, no thermal tester can distinguish them. It will identify both as "Diamond." For high-end appraisal, laboratory equipment is required. Can it test rings or colored gems like rubies? It’s optimized for diamonds and simulants like CZ and glass. For mounted rings, touch only the stone, not the metal. It’s not designed for colored gems like rubies or pearls, but the UV light can help observe unique fluorescence patterns.

• Identify genuine diamonds instantly. Accurately distinguish authentic diamonds from simulants like cubic zirconia, glass, crystal, or white sapphire using advanced thermal conductivity. Perfect for screening inherited collections or verifying finds at flea markets and pawn shops, Includes a Standard 9V Battery (same type available in the U.S., easily replaceable) for immediate testing.
• 365NM UV & MOISSANITE SCREENING : The integrated 365nm UV light reveals fluorescence—an important clue for authenticity. Since Moissanite and fakes show unique color reactions (unlike diamonds), this is a critical second layer of verification. Note: Thermal testing alone may be inconclusive for Moissanite; always use the UV light for a combined assessment.
• FAST 0.5S INSTANT RESPONSE : After a 25s warm-up, simply touch the stone for a 0.5s response, ensuring a seamless experience for beginners.Using a high-sensitivity thermal probe, hold the conductive panel on the back and touch the stone at a 90° vertical angle. A Red LED and beep instantly signal when a genuine diamond is detected.
• PRECISION TESTING STANDARDS :For maximum accuracy, follow these guidelines: Use with bare hands (no gloves) to ensure proper conductivity; test at room temperature (50–95°F); and ensure the diamond is 0.02 carats or larger.
• It is the easiest answer for the vast majority of retail jewelers,pawn brokers and chain stores when faced with the decision of which diamond selector to buy.
• [Package include]:1 x Diamond Tester Pen, 1 x Tweezers,1 x Testing Platform,1 x 9V battery,1 x a comprehensive instruction manual.