Measures refractive index quickly and precisely for gemstones and other solid materials, giving you accurate optical readings to verify identity and quality. Key benefits Precise measurement: Delivers reliable refractive index values to help confirm gemstone type and detect treatments or substitutions. Fast identification: Distinguishes single (singly refractive) and double (doubly refractive) gemstones quickly, reducing time spent on manual tests. Portable design: Light and compact for easy transport—ideal for fieldwork, trade shows, and retail counters. Long battery life: Low power consumption extends operating time between charges, so you can test more stones without interruption. Simple operation: Clear, focused function for straightforward on-the-spot testing without complex setup or extensive training. Broad compatibility: Suitable for a wide range of gemstones and other solid materials that require refractive index measurement. How it solves common problems Eliminates delays from sending items to a lab by providing immediate, trustworthy readings. Reduces risk of misidentification by confirming single vs. double refractivity and precise index values. Improves workflow for jewelers and appraisers with a compact, dependable tool that works wherever you need it. Practical applications Jewelry retailers: Verify incoming inventory and confirm the identity of loose stones before sale. Field appraisers and gemologists: Perform on-site testing during appraisals, estate visits, or gem hunts without relying on lab equipment. Hobbyists and collectors: Quickly check gemstones and cabochons at home or at trade events to make informed buying and cataloging decisions. Specifications and performance highlights Function: Refractive index determination for gemstones and solid materials. Identification capability: Differentiates single and double refractive gems. Design: Light, compact, and portable for easy transport and use. Power: Low power consumption for extended service intervals between charges. Trustworthy, focused performance for professionals and enthusiasts who need accurate refractive index measurements on the go.