Precision Gemstone Refractometer, Jewelry Tester Identification Tool, with LCD Screen, 0.001 Measuring Precision, for All Gemstones Suitable for Personal Use and Jewelry Jade Shops

Say goodbye to gemstone identifying headaches—our digital refractometer delivers rock-solid accuracy without messy oils, safeguarding both your gems and your professional pride!Features:1. Refractive index range 1.300 to 3.000, high precision up to 0.001 with error within ±0.005.2. 300g lightweight and sturdy aluminum alloy body, scratch and corrosion resistant, perfect for outdoor use.3. Clear LCD display for easy reading even in different light environments.4. No refractive oil required, simply place the gemstone on the platform for fast and clean testing.Specifications:Product Name: Electric Boot Drying Rack ShoeMeasuring 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/5.31x3.07x0.94inNet Weight: 0.6kg/1.32lbsPackage Size: 17x15x7cm/6.69x5.9x2.75inpackage Weight: 750g/1.65IbsPackage Included:1 x Gemstone Refractometer1 x Calibration Block (1*1.487, 1*1.806)1 x Aluminum Box1 x Tweezers1 x Countertop Cover1 x Instruction ManualNote: 1. Color of this item may vary slightly from the pictures due to differences in light and screen configurations.2. Please allow slight size differences due to different manual measurements.3. For any inquiries, do not hesitate to contact us, and we will respond within 24 hours.

• 【Precise Gemstone Identification】：Adopting an advanced optical system and LED backlight, this refractometer delivers reliable readings with a refractive index range of 1.300–3.000, high accuracy of ±0.005 and 0.001 resolution for professional gemstone testing
• 【Sturdy Safe Construction】：Built with a wear-resistant aluminum alloy testing platform for long-term use, it features an ABS engineering power switch and triple-layer insulation design to effectively prevent electric leakage and ensure safe operation
• 【Simple Testing Operation】：This gemstone tester requires no refractive index oil, simply place the flat surface of the sample against the measuring plate to get data, helping you identify uniaxial or biaxial crystal structures easily
• 【Scientific Working Principle】：The device operates on the theory of total internal reflection, which enables it to detect the refractive index—a key optical value used to analyze the physical properties and category of various gemstones
• 【Extensive Application】：Compatible with uniaxial and biaxial crystals alike, this testing tool efficiently identifies all kinds of gems such as diamond, moissanite, colored stones, natural or synthetic gems, minerals and other solid materials