The Slate Wall is a fence you can build (the Slate kit).
In-game description
A low wall of split blue slate, iron-capped. Pens animals in; a jump clears it.SHOWN IN THE BUILD RING
Building it
It costs 2 
Stone, 1 Earth spirit. It needs 1 Jewel first. Take it down with DISMANTLE to get its cost back (see Building).
