1. precision refractive index measurements enable quick and reliable gem identification. 2. Portable and easy to use: lightweight, compact design for convenient onthego testing. 3. Designed for gemstone identification: specifically measures the refractive index of gemstones and solid materials. 4. Long lasting battery: low power consumption supports extended use between charges. 5. Compatibility and practicality: suitable for gemstones and solid materials, delivering consistent performance across common identification tasks. Use scenarios 5. In a jewelry store or during an appraisal to verify gemstone identity on demand and assist with client decisions. 6. In a gem grading lab or workshop to quickly screen stones during cutting, sorting, or quality assessment. 7. At trade shows or field inspections to identify stones on site without the need for a full laboratory setup.