Perhaps the jeweler is that one where the perception skill is used in. So that this crafter can use his perception skill to find other particles of stone/gems used in items. And again unlocks/discovers/experiments recipes for himself or for the one who handed over the item?

Stonemason is pretty cool on its own.
I did find this online. I liked the idea of going into more expert lines of masonry. What do you guys think if that?