Small Thorium Vein
This object can be found in Un'Goro Crater (118), Burning Steppes (33), Eastern Plaguelands (26), Silithus (25), Blasted Lands (19), Western Plaguelands (18), Searing Gorge (16), Winterspring (14), Tanaris (13), The Hinterlands (11) and Feralas (4).