I haven't had any trouble with turning page on iPad. My friend had no trouble with it either.
As for making blanks with polymer clay, I don't have the delicate touch Toni or some of the other have. My friend wanted red, white, green and black to match the case she uses for her iPad. So I got those colors, made a roll of red, rolled out some softened white and wrapped it around the red. Then I did the same for the green and black - white and green were thin layers. It was all about 1/2" round. I "rolled it" back and forth till it was a real long, thin roll. Then I sliced pieces off about 1/4" thick and pressed them to the tubes with pattern showing. Bake it according to directions. I let it set few hours to cool and finish hardening before I put it on the lathe and turn it.
That's about as complicated as I can do right now.
I'm really glad you like it. It came out better than I thought it would. Thank you for your comments.