[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 indicators and audio feedback. Gently place the tip on the gemstone. If it’s a diamond, the device beeps and displays a full row of lit LEDs. If it’s crystal, cubic zirconia, or another non-diamond material, there is no beep. [Portable Design] The diamond detector and 60X LED-lit loupe are lightweight and compact, each including a carrying pouch. They fit easily in a wallet or backpack, making them ideal for garage sales, markets, and swap meets. [Magnification] Includes a 60X LED-lit loupe for assessing diamond clarity, as well as for coin, stamp, and document inspection, reading, and general examination. [Wide Application] Suitable for jewelry verification, electronics (e.g., circuit boards), printing, gardening, educational use, home, and office tasks. 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.