Oyster

Oysters were a type of mollusk found throughout Toril.

Uses
Oysters were one of the few sources of pearls.

An oyster shell could be used as the material component for casting the prismatic eye spell.

Locations
Oysters were found in the High Moor. These freshwater oysters very rarely produced pearls, but that did not stop humans from Secomber from taking the risk in hunting for pearls in the High Moor.

Oysters were cultivated in the Lake of Steam althought few produced pearls. However, a small town on the Lake of Steam, Yhep, was famous for its scarlet pearls.