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.
- 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
Optional Item (not included in set)
Please click here to buy this optional item
or you may contact us at sales(at)gainexpress.com if you want an optional items to be included in your order
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