Description: 【Jewelry Diamond Tester】: This professional diamond selector can distinguish between real diamonds and other imitation gems, ensuring the authenticity of your precious stones 【Multifunctional Gemstone Detection】: It can verify the authenticity of various gemstones including diamonds, sapphires, rubies, crystals, agates, jade and other gems of various sizes 【Professional Practical Tester】: The diamond testing pen is designed to provide quick and accurate results. You will be able to determine item is fake within seconds 【Testing Tool Kit】: The kit includes a diamond testing pen and other professional accessories such as a diamond selector, tester and jewelry cutting measurement tools for assessing diamond . It comes with a convenient portable bag for easy transportation 【Essential Tool】: This professional kit is an essential toolset when going to garage sales, trading diamonds or visiting flea markets. Alternatively, it's also an good tool when testing jewelry Specification: Material: Plastic Aluminum Alloy Size Chart: 32.2cmx22.2cmx7.7cm/12.68inchx8.74inchx3.03inch Package Includes: 1 Jewelry Diamond Tester Set Note: Please allow slightly errors 1-2cm differences due to manual measurement.