Mining quests

Classic

•  [20-30D] The Spectral Chalice -  Gloom'rel in the Summoners' Tomb of Blackrock Depths teaches how to Smelt Dark Iron.

Legion

As with all professions in Legion, Mining has its own quest chain, through which you learn better gathering techniques.

•  [Leystone Ore]

  •   [10-45] Living Leystone Sample
  •   [10-45] Leystone Seam Sample
  •   [10-45] Leystone Deposit Sample
    •   [10-45] The Highmountain Tauren
      •   [10-45] Where Respect is Due
        •   [10-45] The Legend of Rethu Ironhorn
          •   [10-45] Rethu's Pick
          •   [10-45] Rethu's Journal
          •   [10-45] Rethu's Horn
            •   [10-45] Rethu's Lesson
            •   [10-45] Rethu's Experience
            •   [10-45] Rethu's Sacrifice

•  [Felslate]

  •   [10-45] Felslate Deposit Sample
  •   [10-45] Felslate Seam Sample
  •   [10-45] Living Felslate Sample
    •   [10-45] The Felsmiths
      •   [10-45] A Shred of Your Humanity
        •   [10-45D] Darkheart Thicket: Nal'ryssa's Sisters
          •   [10-45] Ondri's Still-Beating Heart
          •   [10-45] Lyrelle's Right Arm
          •   [10-45] Rin'thissa's Eye
            •   [10-45G] Ondri
            •   [10-45G] Lyrelle
            •   [10-45G5] Rin'thissa

•  [Infernal Brimstone]

  •   [45] Infernal Brimstone Sample
    •   [45] Infernal Brimstone Analysis
      •   [45] Infernal Brimstone Theory
        •   [45] For Whom the Fel Tolls
          •   [45] The Brimstone's Secret
            •   [45R] Hellfire Citadel: Hellfire and Brimstone

Battle for Azeroth

Monelite Deposits

1.   [10-50] A Need For Coal
2.   [10-50] Spiderphobia

1.   [10-50] Lumbering Away
2.   [10-50] Insufferable Bloodsuckers

Monelite Seams

1.   [10-50] Don't Pick a Fight
2.   [10-50] Seams Familiar

1.   [10-50] Lending a Hand
2.   [10-50] An Exquisite Brooch

Storm Silver Deposits

1.   [10-50] Ritualistic Preparations
2.   [10-50] Brined Justice

Storm Silver Seams

1.   [10-50] Three Sheets to the Wind
2.   [10-50] Back to Franklin/  [10-50] Back to Biru
3.   [10-50] The Wrath of Grapes

Platinum Deposits

1.   [10-50] An Exceptional Platinum Shard
2.   [10-50] X Marks the Plat!
3.   [10-50] A More Challenging Career

1.   [10-50] An Exceptional Platinum Shard
2.   [10-50] The Platinum Map
3.   [10-50] An Ore for an Eye

Osmenite

•   [50] Ounces of Osmenite
•   [50] Seams to be a Problem