Portable Gem Refractometer, Refractometer Jewelry with LCD Display and 700mAh Battery, Refractive Index 1.300-3.000, Measuring Accuracy 0.001, Applicable to Various Gemstones

✔This Professional Gemstone Identification refractometer is equipped with a precision optical system and a wide measurement range (RI 1.300–3.000), allowing accurate identification of various gemstones such as diamonds, sapphires, rubies, emeralds, and more. It is an essential tool for gemologists, jewelry designers, and enthusiasts.✔Working Principle：Operating on the basis of total internal reflection, the gemstone tester measures one of the most fundamental optical parameters of gemstones—the refractive index. This key characteristic allows users to accurately identify and differentiate gem types based on their unique optical properties.✔FEATURE:- Precision Measurement: Accuracy up to ±0.005, minimum scale value of 0.001.- Large LCD Backlit Screen.- Durable Aluminum Alloy Table.- Insulation Switch: Made of ABS material.- Built-in 700mAh lithium battery, up to 10,000 measurements.✔SPECIFICATION:Measuring Range: Refractive Index 1.300–3.000Error: ±0.005Accuracy: 0.001Battery Type: Lithium Battery (700mAh)Battery Life: Approx. 10,000 testsProduct Dimensions: 13.5×7.8×2.4 cmNet Weight: 0.8 kg✔PACKAGE INCLUDE:1 * Gemstone Refractometer2 * calibration Block (1*1.487, 1*1.806)1 * Aluminum Box1 * Instruction Manual

• ✔【Professional Gemstone Identification Tool】The data gemstone refractometer can measure the refractive index value of gemstones non-destructively, quickly and accurately, and can determine other optical characteristics of gemstones. Measuring range: refractive index 1.300-3.000.a measurement accuracy of up to 0.001, a measurement error of ±0.005.
• ✔【Simple Test Method】Unlike traditional methods, this gem Identification Instrument requires no refractive oil. Simply place the sample’s measurement close to the platform for instant results. The process not only simplifies working but also maintains the integrity of delicate gems.
• ✔【Premium Construction Materials】The gem refractometer uses hard aluminum alloy to create a work surfaces, which is scratch-resistant and sturdy, providing stable support for precision testing. It is equipped with an ABS engineering plastic power switch and built-in triple insulation protection to effectively block the risk of leakage.
• ✔【Clear Reading & Extended Battery Life】Jewelry Tester Identification Tool featuring a large LCD screen, the device ensures excellent readability even in low-light conditions. Powered by a rechargeable 700mAh lithium battery, it supports up to 10,000 measurements per charge.
• ✔【Comprehensive Material Compatibility】Gemstone ldentification Tester Suitable for both uniaxial and biaxial crystals, this jewelry calibration test tools quickly and accurately identifies single and double gemstones. Engineered for solid materials requiring refractive index verification.