Golden Ioun Stone

Golden Ioun Stone raises the Intelligence of the wearer by 1 point, which are all classes. As intelligence is a primary chararter ability for Bards, Mages and Sorcerers, they benefit the most from wearing this. This item appears in Baldur's Gate II: Throne of Bhaal and this item will probably appear in Baldur's Gate II: Enhanced Edition. It's not known where this item can be found.

In-game description
"Highly sought out by wizards and mages, this ioun stone raises the intelligence of those who possess it."