Each gem has a typical refractive index due to its chemical composition and crystallization structure. The gem refractometer can be used to observe the optical properties and the structure of a gemstone. Through the parameters you can judge whether the gem is an anisotropic or isotropic stone. The stone needs a flat and polished facet. FULL SCALE Contact Liquid (RI Fluid) is also needed when testing.

Features:

Wide Measuring range: 1.30 ~ 1.81 RI
High Accuracy: 0.01 RI
Flashlight
Polarizing filter
A bottle of 3ml FULL SCALE refractive index (1.79 RI) oil


Specifications:

Accuracy: 0.01 RI
Measuring range: 1.30 ~ 1.81 RI
Scale division: 0.01 RI
A bottle of 3ml FULL SCALE refractive index (1.79 RI) oil (included)
Filter: Polarizing filter
Power source: 1 x CR2032 button cell battery (Not Included)
Item size: approx. 32 x 61 x 128 mm
Item weight: approx. 730g

1 x Gem Refractometer (main unit)       320g
1 x 3 ml FULL SCALE refractive index (1.79 RI) oil      20g

1 x Flashlight  40g
1 x instruction manual
Carrying pouch with white box   350g