Sunstone Bullet

Sunstone Bullets are enchanted bullets +1 which also inflicts two points of fire damage when hitting the target. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition.

These bullets can only be found in the ruined temple of Amaunator in the Ruined Temple Area.

In-game description
"Magical currents are embedded inside this bullet so that it seems a little more balanced and lighter as it jumps towards an opponent. When the bullet strikes an opponent it explodes in a flash of fire."