Mask of King Strohm III

Mask of King Strohm III is a quest item needed in the side quest of Samia, who wants to find ancient documents. It's made by collecting all six pieces of the mask, who are guarded by six genies. After collecting the sixth piece, this will appear in your inventory. The only use of this mask is to make a fire elemental visible. However, this creature can be made visible also by Detect Invisibility. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition.

In-game description
"This is the reconstructed mask of King Strohm the third. When you place it on your face, the entire world becomes tinted with odd colors. Perhaps this mask will allow you to see something that you hadn't been able to before, but its use beyond that seems questionable."