The Gemports Index (GPI) is an internationally recognized benchmark for colored gemstone valuation, supported by standardized units, aimed at making price comparisons of colored gemstones easier. GPI uses 2019 as its base year. Developed by Gemports as an extension of Gemports Information Services, GPI serves as a practical tool for tracking changes in the value of colored gemstones in B2B, B2C, and C2C markets.