Portable Jewelry Authenticity Tester - Diamond and Gemstone Refractometer with 1.300-3.000 RI, 0.001 Accuracy, LCD Display, 700mAh Battery - Ideal for Professional Jewelers and Gem Enthusiasts

This gemstone refractometer is a precision tool designed for the identification of polished gemstones, featuring a large LCD backlight for clear readings. It measures refractive indices from 1.300 to 3.000 with an accuracy of 0.001 and an error margin of ±0.005. Ideal for testing various gemstones, including jade and Hetian jade, it helps determine if their refractive indices match expected values (1.66 for jade and 1.61 for Hetian jade). It also distinguishes between natural and artificial diamonds, with natural diamonds having a refractive index of 2.417. ▶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)▶Products include:1*Professional Digital Gemstone Refractometer2*calibration block (1*1.487, 1*1.806)1*aluminum box1*instruction manual▶Note: Slight color variations may occur due to lighting, and a 1-3cm measurement error is possible due to manual handling.

• Introducing our Professional-Grade Digital Refractometer, designed for precise refractive index measurements. With a measurement range of 1.300-3.000 and accuracy of ±0.005, it ensures reliable results for professionals and enthusiasts alike. This easy-to-use tool features a high-precision optical system and advanced electronics, perfect for various applications in chemistry and food analysis. Get accurate data effortlessly!
• Introducing our **Wide Cali for Mstones**: This essential tool accurately identifies both uniaxial and biaxial crystals, including Moissanite, Diamonds, and Colored Mstones. Perfect for gem appraisal institutions, processing factories, and collectors. Not suitable for semi-hed products, polished Mstones, or stones smaller than 2.0mm². Elevate your gem identification process with precision and ease!
• Discover our innovative Oil-Free and Easy-to-Use Refractive Index Measurement Tool, designed for precision in Gemstone Identification. This essential tool simplifies the process by requiring no refractive oil, preserving the integrity of your samples. It includes two calibration blocks (1.487 & 1.806) for accurate pre-measurement, allowing you to effectively distinguish between uniaxial and biaxial crystals with ease.
• Experience precision with our Digital Refractometer, utilizing Total Internal Reflection technology for accurate Refractive Index measurements. Weighing just 250g, its lightweight and portable design ensures easy handling. Crafted from corrosion-resistant aluminum alloy, it offers durability and safety for various applications. Perfect for both professionals and enthusiasts seeking reliable performance in a compact form.
• Jewelry Authenticity Tester offers a durable aluminum alloy workbench for stable precision. Its ABS plastic power switch and built-in triple flat protection enhance safety. The large LCD display ensures easy reading in low-light conditions. Powered by a 700mAh rechargeable lithium battery, it supports up to 10,000 measurements per charge, making it ideal for labs, field trips, and jewelry stores.