A gem refractometer is an optical tool used to measure the refractive index of gemstones, a key property for identifying and verifying them. In this article, we explain what a refractometer is, its main applications,how to use one, and how to choose the right one for your needs.
What is
The gemological refractometer, or simply gem refractometer, is an essential instrument for identifying and analyzing gemstones. It measures the refractive index (RI) of a gem, one of the most reliable properties for distinguishing different materials. Each gemstone bends light in a specific way, expressed as its RI value and related optical behaviors. With this device, users can determine whether a stone is singly or doubly refractive, uniaxial or biaxial, and can calculate its birefringence. By comparing these measurements with known reference data, users can accurately identify a gem and determine whether it is natural or synthetic. Reliable RI testing ensures correct valuation and builds trust in the gemstone trade.
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