Model Number: RHG-181 Brand Name: TLead Key Specifications/Special Features: Gem tester refractive index is one of most important optical parameterGloss of gem can be estimated by the parameterKinds of gem can be precisely determined in accordance with the measured value of refractive index because every kind of gem has its inherent refractiveBesides, index of double refraction can be also measuredThrough the parameter you can judge whether a gem is uni-axial or bi-axial photo-positive or photo-negative

Gemological refractometer is characterized by small volume and less weight

It is easy to carry

It is a popular instrument used in jewelery market