- Mar 10, 2010
I saw a stone with a GIA grade of only good, yet it scores 1 on the HCA. The crown and pav angles are 35/40.6, but the depth is 63.5 and it has a very thick girdle. What kind of performance is this one likely to have? How much light is lost because of the depth when the angles are good. Besides the obvious smaller diameter, that is.