Workmanship

Affiliated stats:

        Primary: wisdom
      Secondary: intelligence
       Tertiary: constitution

This skill is automatically in use.

Workmanship is how well a refiner carries out the work, where masonry is how much they know of it. The two go together: a furnace raised with masonry stands or fails on workmanship as well.

A smelting skill, taught by the Professional Refiners. See Smelting, and Crafting for every craft.