A character with this proficiency is able to build
structures from stone in such a fashion that they last for many
years. The stones are often, but not always, mortared together. A
stonemason equipped with chisels, hammers, wedges, and a
block and tackle can build a section of wall one foot thick, 10 feet
long, and five feet high in a day.

Stonemason, Equipment: Like a carpenter, a character with this proficiency
usually goes where there is work. The most limiting factor
of the mason’s task is the availability of stone. Often stones can
be gathered in the immediate area where they are needed. Usually
a stonemason maintains or has access to a sturdy wagon and
a few oxen, so he can transport his materials if need be.
Cost: 250 gp (The cost of raw materials is 11-20%(1d10 + 10)of the value of the finished work.)
Space: Varies