700mAh Gem Tester with LCD Display, Accurate Measurement 0.001, Refractive Index 1.300-3.000, ±0.005 Error, Ideal for Jewelry, Gemstones, and Jade Stores

Unlock the world of gem identification with our Portable Digital Refractometer, designed for jewelers, hobbyists, and collectors. This essential tool allows you to accurately identify gemstones in seconds, offering professional-grade precision wherever you go. Understanding the refractive index is crucial for distinguishing between gem species and verifying their authenticity, and our refractometer delivers lab-level accuracy right at your fingertips. Say goodbye to messy refractive oils! Our innovative design allows for effortless, contactless readings—simply place your gem or solid sample on the measurement platform for quick results. Featuring a high-precision sensor, this device measures refractive indices from 1.300 to 3.000 with an accuracy of ±0.001 and an error margin of only ±0.005, ensuring you receive reliable data every time. Weighing just 250g (0.55 lbs), this refractometer is crafted from durable aluminum alloy, making it both lightweight and rugged, perfect for fieldwork or gem shows. The bright backlit LCD display provides clear readings in any lighting condition, enhancing usability on the go. Powered by a long-lasting 700mAh battery, this device can deliver approximately 200 measurements per charge, making it an efficient choice for extended use in shops or during field trips. Your complete gem identification package includes everything you need: the refractometer, a protective aluminum box, tweezers, a cleaning cloth, a countertop cover, calibration blocks (1.487 & 1.806), and an English manual. For optimal performance, remember to calibrate the device using the included calibration blocks before each use. Experience the convenience and accuracy of our Portable Digital Refractometer and elevate your gem identification skills today!

• Discover the importance of the Gem Refractometer for evaluating gemstones. With its high-precision sensor, this tool measures the Refractive Index, a key optical characteristic for distinguishing various Gemstone Types. Utilizing the principle of total internal reflection, it offers reliable support for gem identification and assessment of physical properties. Enhance your gem analysis with this essential instrument.
• Discover our Portable Jewelry Refractometer, designed for optimal convenience and durability. Weighing just 250 grams, its lightweight aluminum alloy shell is both scratch-resistant and corrosion-resistant. The LCD backlit display provides clear visibility, while the ABS insulated switches and triple insulation protection enhance safety. Perfect for gem enthusiasts and professionals alike!
• 【Wide Application】This Refractive Index Measurement Tool is ideal for evaluating gemstones and solid materials. Quickly and accurately identify single and twin crystal gemstones, diamonds, and colored stones. Perfect for use in jewelry appraisal, gem processing, and by collectors. Note: Not suitable for semi-finished products, poorly polished gems, stones under 2.0mm², or rough stones.
• 【Easy to Use】No need to use refractive oil, just bring the sample close to the measuring platform to measure. Based on this parameter, you can tell whether the gemstone is uniaxial or biaxial. In addition, it is equipped with two calibration blocks of 1.487 and 1.806, which need to be calibrated before measurement to ensure the accuracy of the measurement results.
• 【Wide Application】Designed for measuring the refractive index of gemstones and various solid materials, it can quickly and accurately identify single crystal gemstones, twin crystal gemstones, diamonds and various colored gemstones. It is widely used in jewelry appraisal institutions, gem processing factories, collectors and other scenarios. Note: Semi-finished products, poorly polished gemstones, gemstones less than 2.0mm² and rough stones cannot be measured.