Type Of Diamond Cuts The Essential 7C's Introduction Round Brilliant Cut Modified Brilliant Cuts Step Cuts Mixed Cuts Vintage Cuts Introduction Currently most laboratories only provide cut grading for round diamonds as it is harder to assess the ideal proportions for fancy shape diamonds. The only laboratory that currently provides cut grades for fancy shaped diamonds is the less well known AGS, which introduced a Princess cut grade in 2005 and an Emerald cut grade in late 2006. Currently most laboratories only provide cut grading for round diamonds as it is harder to assess the ideal proportions for fancy shape diamonds. The only laboratory that currently provides cut grades for fancy shaped diamonds is the less well known AGS, which introduced a Princess cut grade in 2005 and an Emerald cut grade in late 2006. Learn More Polishing (Cut) Process Cut Grading Hearts and Arrows Anatomy of a Diamond and the effects of light Cut Grading across Diamond Shapes