For sale: Grey powdered raw mined sulfur, 99:01% sulfur content.

The Mishraq sulfur fields in Nineveh Governorate, south of Mosul, contain the world's largest reserves of raw sedimentary sulfur. In its natural, unrefined state, the mined raw sulfur appears dark gray or blackish—contrasting with the vivid yellow of refined sulfur—due to its mixture with bituminous and petroleum-based substances and hydrocarbon impurities permeating the region's sedimentary layers.