This is the study of mining and marbling rocks to create tiles. You can identify many different types of rocks and can determine which are suitable for the work required. You know the techniques and technology involved in efficient and safe mining and the identification of precious metals, ores, and gems. This skill would be required at lower levels for sculpting (in Visual Arts or Artisan.) Combining this with Earth Science, you can track veins to follow in his pursuit of precious metals. Combine this skill with Artisan for cutting jewels. Combine this skill with Construction to build structures out of stone and clay.