The Gemological Institute of America (GIA) is one of the most widely recognised independent diamond grading laboratories in the world. All diamonds from Diamonds 27 are graded by the GIA.
Diamond grading laboratories exist to provide peace of mind by creating standards used to grade loose diamonds. The GIA is the world’s foremost authority on diamonds, and is the leading source of knowledge, standards, and education in gems and jewelry.
While there are a number of other diamond grading laboratories which may have their own standard for grading diamonds where they may be more rigid in one category but more lenient in another, the GIA adheres to strict standards associated with diamond grading.
GIA's mission is to ensure the public trust in gems and jewelry by upholding the highest standards of integrity, academics, science, and professionalism through education, research, laboratory services, and instrument development.