I'm on Android and have one at Epic Form and this is the maximum level for him/her. Not sure if iOS is different? I hear talk of level 15? I thought Android had that too now, but not for Jewelry it seems. Just as well - hungry dragon to level up!
As far as I know, only iOS has the possibility of evolving to level 15.
Feel free to add me on Dragon Story!
[I don't visit often but I always answer requests]