LED 1.3~1.81 RI Oil Light Gemological Gemology Gemstone Gem Refractometer TTG-181

Brief Description Each gem has a typical refractive index due to its chemical composition and crystallization structure. The gem refractometer can be used to observe the optical properties and the structure of a gemstone. Through the parameters you can judge whether the gem is an anisotropic or isotropic stone. The stone needs a flat and polished facet. FULL SCALE Contact Liquid (RI Fluid) is also needed when testing. This Gem refractometer is a compact refractometer with built-in LED illumination for the determination of the refractive index (RI), quality and categories of gemstones.   Features Wide Measuring range: 1.30 ~ 1.81 RI High Accuracy: 0.01 RI Built-in LED illumination Polarizing filter   Specifications Accuracy: 0.01 RI Illumination: Built-in LED illumination with on/off switch Measuring range: 1.30 ~ 1.81 RI Scale division: 0.01 RI A bottle of 2 ml FULL SCALE refractive index (1.81 RI) oil (Not included) Filter: Polarizing filter Power source: 1 x CR2032 button cell battery (not included) Item size: approx. 30 x 70 x 130 mm Item weight: approx. 400g   One Set Included 1 x Gem Refractometer (main unit) 1 x instruction manua Carrying pouch