Digital Gemstone Refractometer, Jewelry Tester Identification Tools with LCD Screens, Accuracy: 0.001; Refractive Index 1.300-3.000, for Jewelry, Gold ＆ Silver and Diamond

Features:- No Oil & Effortless : Skip the messy refractive oils! Simply place your gem or solid sample onto the measurement platform for a fast, clean, and contactless reading.- Lab-Grade Accuracy : Features a high-precision sensor delivering measurements from 1.300 to 3.000 with an impressive accuracy of ±0.001 and error margin of only ±0.005.- Portable : Crafted from lightweight yet rugged high-strength aluminum alloy (only 250g / 0.55 lbs), it withstands scratches, corrosion, and fieldwork.- LCD Display : The bright backlit LCD display ensures clear readings anywhere.- Long-Lasting & Efficient: Powered by a 700mAh battery providing approximately 200 measurements per charge.Specifications:Measuring range: refractive index 1.300-3.000Measurement error: + -0.005Measurement accuracy: 0.001Battery life:10.000 TimesPower supply: 700mA Lithium BatteryProduct Size: 13.5x7.8x2.4cm(5.31x3.1x0.94inch)Net weight: 0.8kg(1.76lbs)Packing list:1 * Gemstone RefractometerNotes:1.Due to manual measurement, the size error is 1-3cm. Errors may occur, please refer to the actual product.2.Due to shooting and environmental reasons, the color is subject to the actual product.

• 🧩【Professional Gemstone Refractometer】Digital gemstone refractometer with high-sensitivity sensor and LCD display, designed for accurate refractive index testing to support gemstone identification and jewelry appraisal with professional confidence.
• ✅【High Accuracy & Wide RI Range】Measures refractive index from 1.300–3.000 with 0.001 accuracy and ±0.005 error, enabling fast, non-destructive testing of diamonds, moissanite, colored gemstones and other solid materials.
• 👍【No Refractive Oil Required】Easy-to-use jewelry tester—simply place the gemstone on the measuring platform for instant results. Includes two calibration blocks (1.487 & 1.806) to maintain consistent accuracy before testing.
• 🔹【Clear LCD & Portable Design】Large backlit LCD screen ensures clear readings in any lighting condition. Lightweight ~500g aluminum alloy body makes this portable gem refractometer ideal for jewelry stores, labs and on-site inspections.
• 📌【Designed for Jewelry Professionals】Suitable for jewelers, appraisers and collectors, this gemstone identification tool helps identify uniaxial and biaxial gemstones, diamonds and colored gems—an essential refractive index tester for jewelry.