yeah, there is noway anybody can tell you that by looking at the picture. It certainly is a beautiful diamond. You should send it to GIA to get it graded
Thanks minmin001 and Dreamer D. It is a very beautiful stone, but you can only see white arrows with the naked eye, never black unless taking a photo. And seems to have great fire and brightness -- although I am not sure exactly what constitutes fire. ---sparkle??
I think it looks like a well cut stone too. Agree with others that it's a good idea to get a GIA report, or at least get an appraisal for insurance. With that you'll know the numbers for certain.
Judging from what I have seen, my uneducated guess is that it probably has a ~59% table and maybe ~40.8 pavilion angle.
Would guess little deeper pav from table reflection for the table size and table looks relatively small. But I am not a pro, make an appt w/ an independent professional appraiser and get it looked at, and get it scanned, if you want more info w/o waiting for one of the big labs.
ETA - Karl's article here describes how the arrows are last to "leak" in a deep stone
ETA - reposting as larger pic, hope you don't mind