Table top gem refractometer

Gemstone refractometer

Gem refractometer is a precision optical instrument designed by using the principle of total reflection of light. It is mainly used to measure the refractive index of gemstones. The refractometer ratio is the most important parameter used by gemologists to distinguish and identify precious stones. The refractometer can be used to measure the refractive index, birefractive index, axial and optical positive and negative of gemstones. The measurement range of refractometer is usually RI=1.35-1.85. Refractive index oil is often used to achieve close contact between the gemstone to be tested and the prism surface.

Product model: NZS-002

Technical parameters

High hardness cubic zirconia (CZ) test prism, test range 1.35-1.85,

Accuracy: ≤±0.002,

The gauge reading is accurate to 0.005

Professional narrow-height optical design, the shadow boundary is straight and clear, can measure the gemstone embedded, focal length adjustable eyepiece

Large eyepiece, wide field of view, easier reading

Grounded aluminum alloy table top, corrosion resistant, easy to clean

Built-in quasi - monochrome LED light source, only one battery

Special dual power supply: one No. 7 battery or external DC3V DC power supply, equipped with DC3V DC power supply for the global wide voltage (AC100-240V) power supply

With a polarizer, a bottle of refractive oil (1.785±0.005)