Refractive Index Checker

Refractive Index (RI) measures how light bends when entering a gemstone. This property is unique to each gem species and is essential for accurate identification.

RI Calculator & Matcher

Refractive Index (RI) = Speed of Light in Vacuum รท Speed of Light in Gemstone

Measured using a refractometer or our digital analysis tools
Range: 1.30 - 2.50 (typical gemstone RI values)

Matching Gemstones