Gemological Refractometer (1.30 ~ 1.81 RI) with Index Oil

The Refractive Index is a crucial optical parameter used to identify and authenticate polished precious and semi-precious gemstones. This Gemological Refractometer is a cost-effective, lightweight tool designed for jewelers and gemstone traders to measure polished stones across a refractive index range of 1.30 to 1.81 RI. It also helps in identifying whether a gemstone is isotropic or anisotropic (uniaxial or biaxial).

This refractometer serves as a primary and powerful tool in gemstone identification, allowing for precise measurement of the Refractive Index of faceted stones, just like a typical critical angle refractometer.

Features

• Quick and accurate identification of singly and doubly refractive gemstones
• Uniquely designed with low battery consumption for portability
• Approved by strict quality and safety standards for durability and reliability
• 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
• Dimensions: 30 x 70 x 130mm
• Weight: 400g