FGR-003 Gem Refractometer 

Specification:

• Hard CZ measuring prism.Scale range:1.35-1.85.
• Accuracy: plusmn;  definition ≤ 0.003
• Professional optical design. Aluminum alloy table.
• Internally installed the monochromatic light.
• There are two ways of inputing the voltage:7 batteries and DC3V direct current suply(AC100—240V).
• Each refractometer is coming with a bottle of 2ml refractive index liquid.(RI: 1.785±0.005) with unique design of the bottle(Proprietary technology ZL200620096730.7).  We can't promise to send it as the liquid delivery limit by the airlines.
• It is much safer ,much ecnomical and more convinent.
• One year warranty and lifetime maintenance

Refractive Index is the ID for gemstone, every gem has its own refractive index. Gem Reractometer is special and professional for testing the gemstone RI.