I will quote a passage here from someone else:
you can only apply magicka, health, and stamina enchants to armor slots. While jewelry is loaded with a full arsenal of enchants from a variety of spell resistances, weapon/spell damage, armor, potions, shields, and all 3 regen stats. I cannot emphasize enough how much this confuses me. It seems completely contradictory to the overcharging system that the 7 slots of gear can only be given a variety of 3 enchants while the 3 slots of jewelry can be given (educated guess) a variety of 14 enchants. Hopefully I am horribly mistaken. I believe this contradicts overcharging because it prevents players from diversifying their stats.
And now we add the fact that:
-You can't enchant any Set Items,
-You can't enchant any Boss Drops:
-You can't enchant any Quest Rewards:
The only thing you actually can enchant is this:
I cannot emphasize enough how much this confuses me.
Pack Leader of "Werewolves"