Professional Digital Gem Refractometer for Jewelry Identification, 1.300–3.000 RI Range, LCD Screen, Portable High Accuracy Tester 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.

• 【Gemstone Identification Tool】Built with high-sensitivity sensors and a clear LCD display, this digital gemstone refractometer measures refractive index values non-destructively and accurately, helping identify gemstones and analyze their optical properties with confidence.
• 【Precise Measurement】Refractive Index 1.300-3.000, Measuring Accuracy 0.001, Measurement Error: ±0.005, providing stable and repeatable results for professional jewelry testing and appraisal.
• 【Durable & Safe Materials】Features a scratch-resistant aluminum alloy work platform for stable testing, combined with an ABS engineering plastic power switch and triple insulation protection to enhance safety and reduce electrical risk during operation.
• 【Clear Digital Reading】Large LCD screen ensures easy readability even in low-light environments. Powered by 700mAh rechargeable battery, supporting up to 10,000 measurements per charge for uninterrupted daily use.
• 【Wide Application】Designed for measuring the refractive index of gemstones and solid materials, suitable for identifying single and double refractive gemstones, diamonds, and colored gemstones, ideal for jewelers, appraisers, collectors, and gemstone enthusiasts.