GIA is an independent laboratory that grades diamonds and gemstones.
They have a team of gemologists that are highly educated that grade the
stones. When grading a stone, multiple gemologists have to look at the
stone and agree on the grades before finalizing the document. This
ensures that it is the most accurate. They are located in New York City
as well as Carlsbad, California (they also have labs in other countries, for a full list visit their website at www.gia.edu. GIA is also the leading school for
education on diamonds and gemstones as well as jewelry and the industry.