Professional Digital Gem Refractometer |Refractive Index 1.300-3.000 | Jewelry Identification Tool, No Refractive Oil Needed

Say goodbye to cumbersome refractive oil and hello to effortless gem testing! This digital gem refractometer is engineered for professionals and enthusiasts seeking fast, accurate, and clean measurements of gemstone refractive indices (RI) across a 1.300–3.000 range. Whether verifying diamond authenticity or distinguishing red spinel from glass, this tool delivers lab-grade results without the hassle of traditional oil-based methods. Perfect For Jewelry Retailers: Verify inventory authenticity before purchases to avoid costly mistakes. Auction Houses & Collectors: Confidently appraise high-value gems with zero contamination risks. Educational Institutions: Teach gemology students with a hassle-free, oil-free tool. Hobbyists: Protect your collection by identifying fakes at home with professional-grade accuracy. Specifications: Measuring range: refractive index 1.300-3.000 Measurement error: + -0.005 Measurement accuracy: 0.001 Power supply: 700mA Lithium Battery Battery life:10.000 Times Product Size: 13.5x7.8x2.4cm(5.3x3x0.94inch) Net weight: 0.8kg(1.76lbs) What’s Included: 1 x Digital Gem Refractometer 1 x Protective Carrying Case 2 x Calibration block 1 x User Manual

• Full-Range Measurement (1.300–3.000): Accurately tests diamonds, colored gemstones
• Instant Authenticity Check: One-touch operation distinguishes natural gems from fakes in 3 seconds
• High-Precision Digital Display: LCD screen shows readings with ±0.005 error margin, eliminating visual estimation errors
• No Refractive Index Oil Required: Innovative contact probe detects directly on gem surfaces—skip messy oil applications
• Portable & Lightweight: Compact design (200g) fits in pockets for on-the-go use in labs, auctions, or retail stores