This is straight from the ffxiv website which is still in it's original form

Blacksmiths
"Blacksmithing techniques are capable of weakening enemies constructed of metal, as well as discovering loot that would otherwise be overlooked by the untrained eye"

Miners
"In addition to their unexcelled prowress at throwing rocks, miners also use their skills to debilitate enemies with mineral compositions"

These are the kinds of comments dierctly from SE that I form my basis on. Just saying.