Yes you can. The beauty of jewels is that their mods will apply regardless of where you socket them. There are a few "bugs" associated with certain jewels socketed in certain places, but since your jewel isn't one of those jewels, I won't go further into detail. :wink3:
Although ED on non weapon is different from ED on weapon.
ED on weapon enchances the damage to the weapon itself, where ED on non weapon adds the damage from the weapon to your total damage. So ED on non weapon seems a bit less useful when it is not on weapon, but it is always good to have better damage :laugh: