Ade Advanced Optics Digital/electronic Gem Refractometer 1.4~3.0 Ri Gemological Gemstone Diamond Jewel Testing Tool

Each kind of gem has a typical refractive index due to its chemical composition and crystallization structure. Refractive index is one of most important optical parameter, through the parameters you can judge whether the gem is an anisotropic or isotropic stone. This digital gem refractometer is designed to measure the refractive index of gems with high accuracy ± 0.007 RI. With the full range from 1.400 to 3.000 RI, it can be used to test almost all kinds of gem. You don't need to apply RI fluid, just simply put your sample on the test platform and read the result on the LCD very quickly and conveniently. A gem refractometer is the primary and most powerful tool in gemstone identification. Therefore, it is widely used in jewelry stores, gem workshops, museums & collections, auctions, laboratories and etc SPECIFICATIONS: Measuring range: 1.400 ~ 3.000 RI Accuracy: ± 0.007 RI Working temperature: 10 ~ 28°C (50 ~ 82.4°F) Power source: 1 x 9V battery (included) Item size: approx. 105 x 60 x 35 mm Item weight: approx. 339g FEATURES: Wide measuring range: 1.400 ~ 3.000 RI High accuracy: ± 0.007 RI No refractometer oil needed Read results on LCD Easy and simple to use INCLUDE: 1 x Digital Gem Refractometer (main unit) 2 x Scale Sample 1 x Cleaning Cloth 1 x 9V battery. 1 x Instruction Manual Carrying Pouch Standard Factory Package