Features:
* and
*Made of - materials, sturdy and
*Various gemstones can be determined based on their refractive index, because different gemstones have fixed refractive indexes.
*In addition, birefringence can be measured.
*This parameter can be used to determine whether a gemstone is a uniaxial or biaxial for crystal.
*This gemstone refractometer is small and lightweight. Unique design, extremely low power consumption and easy to carry.
*Easy to carry and very popular in the jewelry industry.
*Tested to strict quality and safety standards for long, trouble-free service life.
*-, high- for measurement results.

Specification:
*Name: Gem Refractometer
*Colour: Black
*Measurement range: 1.30~1.81RI.
*Minimum graduation value: 0.01RI.
*Size: 30*70*130mm.
*Application scope: pendants, bracelets, gemstones
*Model：A(1X Gem Refractometer+flashlight+refractive oil)，B（1Xflashlight）

Package Included:
1X Gem Refractometer.
1X flashlight
1X refractive oil
or
1*flashlight