High-precision professional diamond tester for beginners and experienced jewelers – Diamond Selector

[Fast and Safe]: The Professional Diamond Selector II detects real and fake diamonds. Designed for fast, precise, and safe testing. [Intuitive Operation]: LCD screen, LED display. Large/small switches allow you to test diamonds; audible signals facilitate differentiation. [Easy to Use]: The diamond tester is easy to use; no professional is required for reliable results. Simply turn on the diamond tester and place the tip on the gemstone (light pressure is sufficient). No beep will sound for fake stones, crystals, or cubic zirconia. 1. Insert the battery and turn on the power indicator. After a short time, the preheating indicator will light up. 2. When testing, set the tri-color indicator to the fourth notch, then press down on the triangular iron plate on the back and align the probe perpendicular to the object being tested. If it is a diamond, the light travels to the ninth grid or above, i.e., into the red range, and a dripping sound can be heard. 3. When testing jade, the light illuminates in the fifth or sixth grid, indicating that the jade has reached its hardness. No sound is heard.