Features: Experience precisions with the high accuracy professional Diamonds tester pen, designed to distinguish genuine diamonds from fakes with ease and reliability, making it essential tool for both novice and expert jewelers. Featuring a high precisions sensor and intuitive LED display, this Diamonds tester pen offers quick and accurate results, ensuring you can confidently assess the authenticity of various gemstones. Suitable for jewelers, gems enthusiasts, collectors, and professional appraisers, this Diamonds tester pen is perfect for anyone involved in the jewelry industry or gemstones evaluation. Whether you're at a jewelry store, auction, gemstones exhibition, or conducting personal collection assessments, this portable and easy to use Diamonds tester pen is your go to tool for on the gemstones verification. With its compact designs and included 9V battery, the Diamonds tester pen is ready for immediate use, providing reliable performances wherever your gemstones evaluations take you. Specifications: Texture: ABS Size: Approx. 6.10inch(15.5cm) Package Includes: 1x Diamonds Test Pen note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.