Found by me
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In Badlands, to the East of Kargath(The specific area is call The Dustbowl), there are Lesser Rock Elementals that drop greys and whites, and have chances to drop greens+. Deeprock Salt and Elemental are two examples of whites that they drop. The Elementals are 37-39. There are two quests that you need to kill them: Badlands Reagent Run and Study of the Elements: Rock. I had to re-install WoW, so I don't have my coordinates addon anymore, so sorry. =(