A hand tool used for carving, cutting, or chipping away at hardened materials such as stone or brick.

You may find Gimlix using a chisel to chip away at the skull of Azema. Breaking through the bone, he extracts a wand with an enormous blue gemstone. - Tome of Encounters (RPA-Tome-ADV3-5)

Imprisoned in Kulbak, you find a chisel hidden under a mattress in your cell block. The chisel will allow you to widen a gap in the wall of your cell, revealing the secret entrance to the catacombs below the prison.

You find a priest using a chisel to damage a statue of Buurglap, the Frogkin god. Elsifor has made a deal with the priest, promising to not reveal his secrets if he destroys the temple.

Humbling yourself before Gulpax, you allow her to share some of her knowledge with you. Using a chisel, she guides you through disassembling a Construct's eye.