Small Thorium Vein
This object can be found in Burning Steppes (233), Blasted Lands (111), Eastern Plaguelands (81), Tanaris (64), Un'Goro Crater (55), Silithus (44), Western Plaguelands (33), Winterspring (28), Searing Gorge (16), The Hinterlands (9), Badlands (7), Swamp of Sorrows (5), Feralas (4) and Felwood (2).