A. 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 a suitable portable gem tester for on-the-go evaluations. B. Engineered for speed and accuracy, this tester delivers reliable results in seconds. Its compact design allows for swift verification of authenticity anytime, anywhere, functioning as a gemstone tester. C. Designed with an intuitive pointer interface, this device maximizes productivity by enabling fast and efficient testing. Its streamlined performance makes it a practical gemstone tester for all stones. D. No professional skills are needed—simply power on the device, gently press the tip against the stone, and get instant feedback. Its user-friendly operation helps ensure accuracy with each test. E. 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. F. Colour: As Shown G. Material: Metal+Plastic H. Package Contents: 1 * gem tester for all stones Only the above package content is included; other products are not. 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.