I'm sorry to tell you that there is no special reward. There is only one. FM teachers can give themselves a ring FM (ring FM only), which has+12 damage and a +4 attribute. Unlike mining+endurance peeling+crit. As for jewelry, you can use sapphire to cut purple stones. There are also+Dharma Injury (I can't remember the details) and +20AP. But this kind of stone is unique in equipment, which means you can only wear one set all over your body.