【Trusted Industry】: This gemstone testing device is not only a diamond detector, but a multi-gem detector. It can detect whether gems are real or fake. Designed to provide fast and accurate results. 【Complete Packaging】: The box includes all kinds of measuring tools you need to buy diamonds, as well as various testing tools, so that you can monitor at any time. 【Easy to Use】: The Diamond Test Pen is used for fast, precise and safe diamond testing, so even a novice is easier to use, comes packaged in a PU case. 【Simple to Use】: 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. 【Complete Tools】: Metal copper rod, ring ring, magnifying glass, four-prong ring holder, diamond cutting mirror, diamond girdle prism, loose diamond clip, tweezers, fire pen, diamond measuring penk.