Presidium® Refractive Index Meter II
Presidium® Refractive Index Meter II
Product Specifications
Product Specifications
Safety, Compliance & Product Documentation
Safety, Compliance & Product Documentation

Product Description
The Presidium PRIM II Refractive Index Meter II (PRIM II) is a desktop device that instantly estimates diamonds, moissanite, gemstone simulants, and colored gemstones without requiring RI liquid. Unlike traditional refractometers, it measures a wider refractive index range (1.000 to ~3.000) covering all commonly known gemstones, and provides fast, clean testing with a crisp LCD display by measuring he quantity of light reflected through the stone. Utilizes a pinhole-sized light reflectivity measure on wide oval platform and a cover cup with blackout interior to ensure light reflectivity measure is accurate. Operates on a 9V battery (not included). For use only with transparent, faceted gemstones with flat polished surfaces.
Key Features:
- Able to test wide range of R.I values from 1.000 – 3.000
- Measures stones as small as 0.02 carats with a 0.6 mm probe tip
- Operates for up to three hours continuously on a single 9V battery (not included)
- Built-in RI chart reference and low-battery indicator with auto-shutoff
- Included software database with the properties of over 50 gemstones (R.I., color, hardness, S.G. value, and origin)
- Software allows users to narrow down gemstone identification by entering known properties
- No need for messy R.I liquids
Complete with:
Built-in Refractive Chart for referencing diamonds and simulants above R.I reading of 1.8
Built-in 8-piece gemstone holder
Pocket-sized Refractive Index Chart pull-out with R.I readings for 55 stones
PRIM II complementary software to help users find out the possible colored gemstone using data on various gemstone properties
Gemstone Dictionary in software with 57 gemstones’ properties (R.I, Color, Hardness, S.G. Value), country of origin and related information
Protective carrying case.