Eye of Tyr

Eye of Tyr is a pommel gem which can be used to upgrade weapons of virtue. There two weapon known: Carsomyr and The Purifier. This item is found in Sendai's Enclave in the room of the lich. This item appears in Baldur's Gate II: Throne of Bhaal.

In-game descrption
"A gift from the God of Justice, this pommel gem gleams with a holy fire. If the burning stone were to be set into the hilt of a weapon of virtue the result would be a blade capable of carving a righteous swath through all the evils that plague the Realms."