ANGDI Gemstone Refractometer, Jewelry Tester Identification Tools with LCD Screens, Refractive Index 1.300-3.000, Error: + -0.005, Accuracy: 0.001, for Jewelry and Diamond

【Gemstone Refractometer】: It is the most important tool for gemstone identification, and can measure the refractive index value of gemstones non-destructively, quickly and accurately. Refractive index test range 1.300-3.000 【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 【Test Method】: No refractive oil is required, just bring the sample's measuring surface close to the measuring platform to measure. Based on this parameter, you can determine whether the gemstone is a uniaxial crystal or a biaxial crystal 【High Quality】: Gemstone Refractometer is mainly composed of high-sensitivity sensors, intelligent electronic devices, and LCD screens 【Application】: Quickly and accurately identify single and double gemstones, moissanite/diamond/colored gemstones, designed for measuring the refractive index of gemstones and solid materials