The Gemological Institute of America (GIA) is an educational institution and the foremost authority of gem research and diamond grading. There are many diamond grading labs across the world, but the GIA is unanimously recognized as the industry leader. Their laboratories span almost every continent, including North America, Europe, Asia and Africa. According to GIA’s website, “the Institute developed the International Diamond Grading System and the 4C’s of diamond quality”, which are used and recognized by industry professionals around the world. GIA’s Graduate Gemologists meticulously examine each submitted gemstone for its unique characteristics, including color, carat, clarity, cut, and more.