@TheLady - very good question.
If it was for a PS member, I'd run the stone through HCA...or ask Karl
If it was a stone I was considering in person, to show to a client live- I'd use my eyes.
Ostensibly, the stone rocks, based on the numbers.
Thanks @Rockdiamond It scored a 1 on the HCA. All excellents. I have the stone. It's one I'm considering.