FVRYCA Gemstone Refractometer with External Flashlight Test Jewelry Refractive Index,Diamond Refractometer for Jewelry Training School,Jewellery Industry Professional Identification Gem Refractometer

Each gemstone 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. Gloss of gem can be estimated by the parameter, The kind of gem can be precisely deter mind in accordance with the measured value of refractive index because every kind of gem has its inherent refractive. Beside index of double refraction can be also measured. Though the parameter you can judge whether a gem is uniaxial or biaxial photopositive or photonegative, The gemological refrectometer is characterized by small volume and less weight. It is easy to carry. It is a popular instrument used in jewelry market. The stone needs a flat and polished facet.

• Measurement Range:1.30 - 1.81RI;Minimum Graduation:(RI)0.01 RI;Scale Division:0.01 nD.
• Including a gem refractometer (main unit),a flashlight and a instruction manual.
• Comes with, leather pouch case, polarizing filter, index reference list and user's manual.Package does not include refractive oil and batteries.
• Approved by strict quality and safety standards.Reliable and assures accurate testing results.
• The main scope of applications is jewellers,training or education and jewellery industry.