So after many years away from the d20 fold, I'm returning under the mantle of Pathfinder. I'm quite enjoying the system, but I wanted to seek the advice of these boards' more august and knowledgable members on a matter of converting a game world's idiosyncracies.
(Apologies if this sort of post is more appropriate to Advice than Conversions.)
I've been a fan of S. John Ross's Uresia: Grave of Heaven setting since its BESM days, and with the recent release of its second, systemless edition, I'm happily whipping up notes for running Pathfinder games in the world. There are lots of similiarities with bog-standard D&D, but lots of important differences, too. Most of these I'm so far finding easy to reskin or otherwise cludge together, but I wanted to see what y'all thought about a couple issues with the way magic works in the world.
First up, the setting is highly magical. There are repeated references to "hedge magic" being practiced by nearly every citizen in the world, from sailors knowing knot-tying spells to simple housekeeping charms. What's the best way to represent this mechanically?
Second, emeralds. Regular emeralds, especially once cut and polished, are batteries of magical power and are easily the greatest treasure in the world. The physically bigger the emerald, the more magic one can tap from it. The largest emeralds power great enchantments and magical devices. It is possible to overtap an emerald, however, and burn it out like a light bulb. No idea how to handle this one--are there any PF/d20 supplements/rules that deal with magical batteries that can be overused and burn out?