Upgrade your jewelry testing with this professional Diamond Tester Pen and LED Magnifying Loupe Kit, designed for both beginners and experts. The diamond selector pen delivers fast, accurate, and easy-to-read results, distinguishing real diamonds from imitation gemstones such as cubic zirconia, crystal, or glass. With its clear LED indicator lights and beeping alerts, users can quickly confirm gemstone authenticity without complicated procedures. The included 30X/60X LED magnifying jewelry loupe enhances precision by allowing you to observe gemstone details up close, making it ideal for jewelers, collectors, watchmakers, and hobbyists. Compact, lightweight, and powered by a 9V battery, this kit is convenient for on-the-go testing, whether at a jewelry store, gem show, classroom, or at home. This all-in-one gem testing kit is suitable for diamonds, jade, emeralds, agates, crystals, and other stones. Please note: this device does not differentiate between natural diamonds and Moissanite (lab-grown diamonds). Perfect for novice users who want a reliable entry-level tester, as well as professionals seeking a portable verification tool. Enhance your confidence in jewelry authentication with this practical and reliable diamond tester kit.