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GIA Diamond Grading Laboratory

The GIA (Gemological Institute of America) has major lab headquarters in the New York City Diamond District as well as in Carlsbad, California. GIA is the acknowledged world leader in the gemological research of diamonds, fancy natural colored diamonds, semi precious stones, treatments, gemological education, and in the innovation of gemological instrumentation. Their grading of diamonds is world renowned and acknowledged for its accuracy, consistency, and stringency.

GIA was the second diamond lab after the AGS to come out with a cut grading system for the round brilliant cut shape in 2006. Their top grade is “Excellent” and a GIA Excellent cut grade diamond that also displays Excellent Symmetry and Excellent Polish is referred to as a “Triple X” by the Diamond Trade.

Stone Shape

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Compare
Shape Carat Cut Color Clarity Price  Advanced » « Basic
Round
Photo Avail.
2.01ExcellentDVVS2 $44,284
Round8.63ExcellentISI2 $145,973
Round0.9ExcellentII2 $1,444
Emerald3.3ExcellentJVS1 $26,659
Emerald1Very GoodGVS2 $3,960
Round3.01Very GoodFVS1 $73,566
Round3.02ExcellentDVVS2 $121,780
Pear3.01Very GoodIVS1 $32,153
Round0.59ExcellentFSI2 $1,249
Emerald1.05ExcellentGVS1 $4,505
Emerald1.01ExcellentGVS1 $4,277
Emerald1ExcellentGVS2 $4,070
Round0.93Very GoodII2 $1,269
Emerald1.06ExcellentDVS2 $3,169
Round1.26ExcellentFVVS2 $9,552
Cushion Brilliant0.4NAHVS2 $776
Cushion Modified3.2ExcellentIVVS2 $28,950
Heart
Photo Avail.
1.01GoodGSI1 $4,961
Heart
Photo Avail.
1.01GoodDSI1 $5,487
Round
Photo Avail.
1.01Very GoodISI1 $4,591
Princess
Photo Avail.
0.7Very GoodEVS2 $2,669
Princess
Photo Avail.
1.04GoodESI2 $4,468
Princess
Photo Avail.
1.01GoodEVS1 $5,118
Princess
Photo Avail.
1GoodEVS2 $5,950
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Diamonds

At Excel Diamonds, we feature thousands of certified loose diamonds in all different shapes, qualities and sizes, including pear shape diamonds, round diamonds, ideal cut diamonds, hearts & arrows diamonds, princess cut diamonds, radiant cut diamonds, heart shape diamonds, marquise diamonds, cushion cut diamonds, asscher cut diamonds, oval cut diamonds and emerald cut diamonds. Our loose diamonds have been certified and graded by the foremost authorities in Gemology; GIA and AGS. A GIA certified loose diamond, or an AGS certified loose diamond, is your guarantee of the highest standards and accuracy in diamond grading.