【Quick Precise Diamond Testing】: Diamond Selector can help you to distinguish whether your diamond is real or fake. It is designed for quick, precise, and safe diamond testing. 【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 a PU box. 【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.