Colour:B Features: 1. All kinds of gems can be determined according to the index of refractive index, because different gemstones have fixed refractive index. This parameter can be used to determine whether a gem is a uniaxial crystal or a biaxial crystal. Unique design, extremely low power consumption and easy to carry. High quality and high accuracy measurement results. Through strict quality and safety standard test, long-term service life. Product specifications: 1. Measurement range: 1.30 ~ 1.81RI. Minimum dividing value: 0.01RI. 3. Size: about 30 x 70 x 130 mm. Included: Style A: 1 x Refractometer 1 x Flashlight Style B: 1 x Refractometer 1 x refracting oil.
Trustpilot
1 month ago
3 days ago
