Stony basalt is an item that can be used to teleport to the Troll Stronghold entrance. It may only be used after completing Making Friends with My Arm.
To create a stony basalt, players must use a basalt with three urt salt and one te salt.
A player teleporting to the Troll Stronghold via the use of stony basalt.
With level 73 Agility and the completion of the Hard Fremennik Diary, the teleport destination is changed to be on the Stronghold roof, right next to the climbing rocks shortcut.
This teleport can be incorporated into a POH portal using 100 of the required salts (300 urt salt, 100 te salt, and 100 basalt).