[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 is easy to operate, featuring LED lights and o alerts. Simply place the tip of the tester gently on the gemstone. If the gemstone is a diamond, the device will beep and display a row of fully lit LED lights. If the gem is crystal or zirconia, there will be no beep. [Easy to carry] The diamond detector and 60X LED lighted loupe are lightweight and portable, both included with a carrying bag. They can easily fit in a wallet or backpack without taking up space, making them ideal for use at garage sales, markets, swap meets, and more. [Magnification] The package includes a 60X LED lighted loupe. It helps assess diamond clarity and can also be used for examining coins, stamps, reading small text, inspections, and other detailed work. [Wide range of use] This jewelry diamond tester has multiple applications, suitable not only for gemstone testing but also for use in electronics, circuit board inspection, printing, gardening, identification tasks, eon, geography, home, and office use. Color: black. Material: metal. Package contents: 1 x diamond tester set. Only the items listed are included; other accessories are not part of the package. Note: Lighting and display differences may cause slight variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.