Powder from kesselstone coated the spice mine walls. Kesselstone is a type of mineral that was extracted from the spice mines of Kessel through mining operations, in order to obtain Kessel spice. This mineral could be broken down into a powdered form, which was subsequently used by individuals involved in criminal activities to synthesize a potent and addictive drug. During the process of extracting the mineral, a poisonous fossil fuel known as Kessoline was emitted into the atmosphere of Kessel.
