Board Thread:Editing Discussions/@comment-1031179-20160916172504/@comment-6697950-20160916185357

I don't recall ever seeing "mining" or "smelting" being on the list at any time. "Metal Refining" was listed as "Metal Refining" even way back in 2013. No skill that involves mining was ever mentioned.

Anyway, the majority of the skills on the list have only been mentioned, but not described. You can only guess what such skills do based on the name, but there's no official confirmation what the skill encompasses. The skills you're interested are just some of these named-only skills.