1. Experience cutting-edge technology with a built-in LED light source that requires no warm-up time. The top box can be opened to match gemstones of different sizes, making it suitable for on-the-go evaluations. 2. Engineered for speed and accuracy, this tester delivers reliable results in seconds. Its compact design allows for swift verification of authenticity anytime, anywhere. 3. Designed with an intuitive pointer interface, this device helps maximize productivity by enabling fast and efficient testing. Its streamlined performance is suitable for testing various stones. 4. No professional skills are needed—just power on the device, gently press the tip against the stone, and get instant feedback. Its user-friendly operation supports consistent accuracy in each test. 5. Not limited to diamonds alone, this tester is suitable for assessing a wide range of gemstones. Whether you're a professional jeweler or a hobbyist, it offers various functionalities to meet diverse testing needs. 6. Colour: As Shown 7. Material: Metal+Plastic 8. Package Contents: 1 * gem tester for all stones (Only the above package content; other products are not included.) 9. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.