Gemstone Refractometer, Professional Jewelry Tester Identification Tool, Measurement Error: ±0.005 / Accuracy: 0.001 / Refractive Index 1.300-3.000, 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.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 RefractometerNote:1. Due to manual measurement, the size error is 1-3cm. Errors may occur, please refer to the actual product.2. After receiving the goods, if you find any problems, please contact us in time and we will help you solve it as soon as possible!

• 【Gemstone Identification Tool】Equipped with precision optical system and LED backlight technology, this refractometer provides accurate refractive index measurements ranging from 1.300 to 3.000, with an exceptional accuracy of ±0.005 and resolution of 0.001
• 【Excellent Materials】Crafted with hard aluminum alloy for scratch-proof work platforms,this gem tester provides 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
• 【Test Method】No refractive oil is required, just bring the sample's measuring surfaces close to the measuring platform to measure. Based on this parameter, you can determine whether the gem is a uniaxial crystal or a biaxial crystal
• 【Working Principle】: The working principle of the refractometer is based on total internal reflection. The refractive index is a very important optical parameter, and the characteristics of gemstones can be determined based on this parameter
• 【Wide Range of Applications】Suitable for both uniaxial and biaxial crystals, this jewelry calibration test tools quickly and accurately identifies single and double gemstones—including moissanite, diamond, colored gems, natural or synthetic stones, minerals, and other solid materials