Cut: All Round All Fancy Marquise Pear Oval Heart Emerald Princess Radiant Triangle Trilliant Baguette Asscher Cushion Carat: 1/10 (0.08-0.12) 1/6 (0.13-0.17) 1/5 (0.18-0.22) 1/4 (0.23-0.28) 1/3 (0.29-0.37) 3/8 (0.38-0.44) -1/2 (0.45-0.49) 1/2+ (0.50-0.69) 3/4 (0.70-0.89) 0.90 (0.90-0.99) 4/4 (1.00-1.49) 1.50 (1.50-1.99) 2.00 (2.00-2.49) 2.50 (2.50-2.99) 3.00 (3.00-3.49) 3.50 (3.50-3.99) 4.00 (4.00-4.99) 5.00 (5.00-5.99) 6.00 (6.00-6.99) 7.00 (7.00-7.99) 8.00 (8.00-8.99) 9.00 (9.00-9.99) Make: All Ideal Excellent Very Good Good Fair Poor Lab: All No Certificate Any Certificate AGA AGS AIG BGI CGL DCLA DGL DLC DPL DRL EDGL EGL EGL Intl. EGL USA GCAL GGL GIA GIPS GQI GS GSI HRD IDI IDL IGC IGI IGL MEG PGS VGR WGI ZEN aaa