I'm searching for pictures of the nails of pros.
I already know you can see the hands of several pros on the homepage of trilogy guitars.
There are also a a few pictures of David Russell showing his nails:
Are there pictures of other guitarist's nails?
I often try to stop HD youtube videos when they show a close up of someone doing artificial harmonics, but the movement of the hand is often enough to make the picture blurry, so you can't the exact shape of the nail.