[Bug] Modify recipe for Stone structure parts to remove iron, replace with wood and mortar

I'd like to see the recipe for stone walls, ceilings, etc... be re-worked.

Something along the lines of Stone, Wood (for the beams we see on the inside of the wall), and Mortar. Mortar would be made with stone dust and tree sap (or something along those lines).

Requiring Iron for Concrete makes sense if you want to use rebar, but for stone masonry... it seems a bit much.

I DO think you should need iron to make the mason bench... you need metal tools to work with stone.