1. Developed for gemstone identification: This professional gemstone refractometer has been carefully designed to measure the refractive index of gemstones and other solid materials. It provides precise readings, making it an indispensable tool for accurate identification and classification of gemstones. 2. Lightweight and portable: This refractometer has a lightweight and compact design that makes it easy to transport. Whether you're traveling as a gemologist or working in a lab, this tool provides exceptional mobility without compromising on functionality. 3. accuracy and simplicity: Achieve accuracy with easy operation. With this gemstone refractometer, you can measure and identify single or double gemstones quickly and precisely. Its intuitive design makes the process straightforward for both professionals and enthusiasts. 4. Effortless gemstone identification: Identify gemstones quickly and precisely with ease. The efficient operation of the refractometer allows for quick testing and ensures that you can accurately distinguish between single and double gemstones. A companion for jewelers and gemstone collectors.