need help deciding on round diamond

[seansba]

So the diamond I was going to buy just got bought, so i'm looking around again. I have a question about the HCA cut advisor. Should I trust the HCA score/rating, or should I look at the idealscope? I ran numbers through the HCA and only got "very good", but the idealscope looks good to me...
AGS-104045694024
1.213ct

 

[JulieN]

HCA was a great weeder tool back in the dark ages, before so much photography and AGS cut grades and everything. It is still a great learning tool to help people understand the necessary relationship between table and angles. But the Ideal Scope is really what is important, and the one above is very nice.

 

[yssie]

ditto, hca estimates performance based on a few input parametres, IS shows actual performance (well specifically, light return in a single instant w/ the diamond in the orientation pictured).