【Easy to View】Clear and easy-to-read analog dials that can distinguish various types of gemstones without waiting for testing, including: diamonds, sapphires, rubies, crystals, and more. 【Diamond Tester】Green indicator will be showed if the stone is a real diamond. It will make continuous buzzing sound when user accidentally touches metal rather than stone. 【Jewelry Gold Testing】This gemstone detecting device is not only a diamond detector, but also a multi-gemstone detector. It can detect if a gemstone is real or fake. Designed to provide fast and accurate results. 【Complete Tools】: specific gravity stone, master color stone, diamond cut table, diamond clarity table, tweezers, loose diamond clip, ring ring, ring stick, fire pen, diamond cutting mirror, four-prong ring holder, magnifying glass, diamond tester Pen, diamond waist mirror, diamond small tray. 【Easy to Use】The diamond test pen is used for fast, precise and safe diamond testing. And it comes with an instruction manual, so even a novice can use it more easily, packed in the box.