Gem Refractometer 1.30 ~ 1.81 RI Range Gemology Gemstone w/ Monochromatic Light

Description

Refractive  Index is one of the most important optical parameters  used to identify and authenticate polished precious  and semi-precious gemstones. This Gemological refractometer  is a low cost, lightweight measuring instrument used  by jewelers and traders of gemstones
to measure polished stones over a refractive
index  range of 1.30 to 1.81 RI
. The instrument can also  be used to identify whether a particular stone is Isotropic  or Anistropic (uniaxial or biaxial).
Gemological  (Gemstone) Refractometer is your primary and most powerful  tool in gemstone identification. As with a typical critical  angle refractometer, it will measure the Refractive  Index of faceted stones.
Features:
Can  identify singly & doubly gemstones quickly  and accurately
Uniquely  designed, low battery consumption and portable
Approved  by strict quality and safety standards for long  and trouble-free life
Guaranteed  high quality and accurate testing results
Brand  new and unused
Specifications
:
Measuring  Range: 1.30 – 1.81 RI
Minimum  Graduation Value: 0.01 RI
Dimension:  30 x 70 x 130mm
Weight:  400g
Set Includes:
1  x Gem Refractometer
1 x Polarizing Filter
1 x Monochromatic Light Filter
1 x Mini  Flashlight
1 x 1.5V AAA Battery
1 x Storage  Box
1 x Refractometer Index Reference List (For 77 common gemstones, i.e. Calcite, Jadeite,  Quartz etc.)
1 x Quick  Start Guide