Coal Ore

Obtained from

Mining — Coal Ore (Lv 30)
Stoneheart Chest — 13% ×100–300 (from Stoneheart Depths)
Firemaking Chest — 17% ×50–150
Forge Chest — 24% ×150–400
Thieving — Miner — 56% of loot rolls
Firemaking — burning any logs (10% per burn on Normal Logs up to 0% on Elderwood Logs, more coal on higher logs)

Used in

Brewing — Forgemaster's Infusion (×20)

Smithing 5

Quest 25