Features: 1. It can be suitable for jewelry, gemstone, document, and currency authentication. 2. Designed for quick, precise, and safe diamond testing. Portable electronic device for distinguishing real diamonds from other simulated stones. Diamond tester is equipped with convenient carrying cases. 3. If the diamond is fake, it will not display and make a sound. If it is a real diamond, there will be a Light up indicator. Diamond tester is very easy to use. 4. This diamond tester pen comes with a leather bag and small testing tray for holding loose stones. 5. Diamond Tester Pen is design to deliver fast, accurate results. You will be able to know if something is fake in a matter of seconds. Notice: *Actual color may be slightly different from the image due to different Display and light effect *Please allow 1-3cm deviation due to manual measurement Description: Package Size: 185*60*35mm includes: 1 set x Portable Diamond Tester Pen