What does GIA mean in jewelry?

In jewelry, GIA means the Gemological Institute of America. Founded in 1931, it is a nonprofit organization that conducts research on and educates the public about gemstones. During the 1950s, GIA unveiled a grading system to help consumers evaluate diamonds, and you will still see GIA ratings used today to describe the cut, clarity and color of gemstones. On 1stDibs, explore a wide range of jewelry.