22X PIT. This chamber holds a nine foot wide circular pit with a depth of about twenty feet. Rogi has told the thermites to dig for gold but they also keep finding gems. Since the dwarf didn't ask for them, they have simply thrown them into this hole.
At the bottom are 8 uncut amethysts (base value 100 gold crescents) and 4 uncut topazes (base value 500 gold crescents).