Product: Presidium refractive index meter Key benefits Accurate gemstone and solidmaterial identification: measures the refractive index (based on the angle at which light is refracted through the sample) to help distinguish and verify gemstones and other solid materials. Portable and easy to use: lightweight, compact design makes it simple to carry between the bench, store, classroom or field site and quick to set up for routine testing. Reliable, longterm performance: manufactured to strict quality and safety standards for dependable, problem use over time. What it does Measures the refractive index of gemstones and solid materials to assist with identification and quality assessment. Provides precise refractiveindex readings by observing light refraction through the stone. Key attributes Function: Refractiveindex measurement for gemstones and solid samples. Compatibility: Designed specifically for gemstones and other solid materials. Size and portability: Lightweight and compact for convenient transport and bench use. Performance: accuracy and straightforward operation for consistent test results. Build quality: Constructed and approved according to strict quality and safety standards for longterm reliable use. How it helps you Speeds up identification and verification of stones, reducing time spent on manual comparisons. Enables consistent, repeatable measurements that improve confidence in appraisals and documentation. Fits easily into workflows for retailers, gemologists, lab technicians and hobbyists thanks to its compact form and simple operation. Use scenarios Jewelry retail or pawn : Quickly verify incoming stones and support or sales decisions with objective refractiveindex data. Lapidary workshop or quality control: Confirm material identity during cutting and finishing to ensure correct handling and grading. Gemology classroom or fieldwork: Provide students and researchers with a portable, accurate tool for handson learning and onsite testing. Included brand and model reference Presidium refractive index meter Simple, practical, and reliable — a compact refractometer built for accurate gemstone and solidmaterial testing without unnecessary complexity.