Fangrui Product Details Experience Cutting- With A Built-in Led Light Source That Requires No Warm-up Time. The Top Box Can Be Opened To Match Gemstones Of Different Sizes-making It The Ideal Portable Gem Tester For Onheo Evaluations Engineered For Speed And Accuracy, Our Tester Delivers Reliable Results In Seconds. Its Compact Design Ensures That You Can Swiftly Verify Authenticity Anytime, Anywhere, Serving As A Topuality Gemstone Tester Designed With An Intuitive Pointer Interface, This Device Maximizes Your Productivity By Allowing Fast And Efficient Testing. Its Streamlined Performance Makes It The Ultimate Gemstone Tester For All Stones No Professional Skills Are Needed-just Power On The Device, Gently The Tip Against The Stone, And Get Instant Feedback. Its User-friendly Operation Ensures Accuracy With Every Test Not Limited To Diamonds Alone, This Tester Is For Assessing A Wide Range Of Gemstones. Whether Youre A Professional Jeweler Or A Hobbyist, It Offers Functionalities To Meet Your Diverse Testin