Professional Jewelry Tester Identification Tool,Gemstone Refractometer,Refractive Index 1.300-3.000, with LCD Screens,for Jewelry, Gold ＆ Silver and Diamond

Specifications: Measuring range: refractive index 1.300-3.000 Measurement error: + -0.005 Measurement accuracy: 0.001 Battery life:10.000 Times Power supply: 700mA Lithium Battery Product Size: 13.5x7.8x2.4cm(5.31x3.1x0.94inch) Net weight: 0.8kg(1.76lbs) Products include: Gemstone refractometer x 1 Notes: Please allow the slight color difference caused by the shooting light and 1-3cm error due to manual measurement.

• 【High Quality 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
• 【Jewelry Tester Identification Tool】: It is the most important tool for gem identification, and can measure the refractive index value of gemstones non-destructively, quickly and accurately. Refractive index test range 1.300-3.000
• 【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】: Quickly and accurately identify single and double gemstones, diamond colored gemstones, designed for measuring the refractive index of gemstones and solid materials