Khorium Vein
This object can be found in Hellfire Peninsula (227), Nagrand (201), Blade's Edge Mountains (167), Shadowmoon Valley (154), Terokkar Forest (133), Netherstorm (129), Zangarmarsh (119), Isle of Quel'Danas (18), Sethekk Halls (14), Auchenai Crypts (10), Shadow Labyrinth (10), Mana-Tombs (9), The Underbog (9) and The Slave Pens (5).