I used to able to clarify gems just fine.
This past weekend I used the piercing gaze on the gem, and got the message about its flaws. (I had all my other containers closed so there would be no confusion with my other gems of the same name.) I then cast clarify gem on the gem I had just cast pg on, and got the message about the glowing bit. After a pause I got a message that I cant clarify that gem because I dont know about its internal flaws.
I bugged it and assisted on it, but this still happens today. Anyone else having this problem?