GIA is internationally recognized as the leader in gem education, research, and laboratory services. Committed to protecting all purchasers of gemstones, the Institute developed the International Diamond Grading System and the famous 4Cs of diamond quality, setting the standard for grading and identification practices used worldwide.
The GIA Diamond Grading Report includes an assessment of 4Cs - Color, Clarity, Cut, and Carat Weight - along with a plotted diamogram of its calrity characterstics and
a graphic representation of the diamond's proportions.
For standard round brilliant cut diamonds falling in the D to Z color range, the report also includes a GIA Cut grade.
The GIA Diamond Dossier® includes an assessment of the 4Cs - Color, Clarity, Cut, and Carat Weight - plus a microscopic laser inscription of the GIA report number for easy identification.
For loose, D to Z color diamonds only, weighing 0.15 - 1.99 carats.
Most consumer purchases of significant value come with important certified documentation. Houses have deeds. Vehicles have titles and registration. But what about
something as important as a diamond?
A GIA Diamond Grading REport isn't an appraisal but a scientific blueprint of your stone's exact qualities. GIA's heritage as a research and educational institution means they are trusted to provide accurate, unbiased diamond evaluations. All GIA diamond grading reports contain a hologram, a security screen, and microprint lines as well as other security features that exceed industry guidelines. Simply put, they're have to help you know what you're buying.
The most widely used and trusted means of verifying a diamond's quality and providing positive identification is a GIA Diamond Grading Report or GIA Diamond Dossier.
A GIA grading report provides an expert analysis of a diamond's quality based upon the "4Cs" of diamond grading: carat, color, cut and clarity. THe GIA Diamond Grading Report also contains a plotting diamogram that clearly shows a diamond's unique inclusions and other clarity characteristics. It undergoes a technical screening process, determining its potential as a synthetic or diamond stimulant, and is tested to ensure that the clor is natural. Because GIA is not affiliated with any commercial enterprise, impartial and accurate analysis of a diamond's quality and value is assured.