The Gemological Institute of America

The Gemological Institute of America (GIA) is a respected organization that specializes in studying and grading gemstones, especially diamonds. They provide education for gemologists and create standards for gemstone quality. GIA is best known for their detailed grading reports, which assess a gemstone’s cut, color, clarity, and carat weight—the "Four Cs." These reports help buyers and sellers understand a gemstone’s true quality and value. GIA's work ensures transparency and confidence in the gemstone industry, making them a trusted authority for both professionals and consumers worldwide.