What gem bonus applies to socketed off-hand items?

Question

Gems provide 3 different bonuses depending on what they're inserted into: Helms, Weapons, and "Other". What do off-hand items like Wizard orbs, Demon Hunter quivers, and Witch Doctor mojos count as?

I'm leaning toward "other", but technically these items are equipped in weapon slots. Which is it?

Answer 1

Off-hands use "other" gem bonuses.

Answer 2

Any off-hand items are not counted as weapons, thus they will the "other" bonus from gems.

Answer 3

They count as "other".

I've tested this, and you definitely do not get the weapon bonus for shields, mojos, etc..