[Simple and Fast] Our diamond tester pen is designed for fast, accurate, and safe diamond testing. In just a few seconds, even a novice can distinguish real diamonds from simulated gems. [Easy to Use] The diamond tester features LED lights and audio feedback. Gently place the tip on the gemstone. If it is a diamond, the device beeps and displays a full row of illuminated LEDs. If it is crystal or cubic zirconia, there is no beep. [Easy to Carry] The diamond detector and 60X LED lighted loupe are lightweight and portable, each with a carrying bag. They fit easily in a wallet or backpack and are ideal for garage sales, markets, and swap meets. [Magnification] The package includes a 60X LED lighted loupe for assessing diamond clarity, as well as for use with coins, stamps, reading, and general inspection. [Wide Range of Use] This jewelry diamond tester is suitable not only for diamond verification but also for electronics, circuit board inspection, printing, gardening, identification, education, geography, home, and office applications. Color: Black Material: Metal Package Contents: 1 x Diamond Tester Note: Screen and lighting conditions may cause slight color variation between the image and the actual item. Measurement tolerance: ±1–3 cm.