Pure Sulfur is bright yellow. The color may be altered if impurities are present. Clay and selenium impurities, as well as volcanic mixtures in sulfur can cause it to be slightly red, green, brown, or gray. Sulfur often occurs in petroleum deposits, where it is found coated with greasy black petroleum. Sulphur is said in the crystal healing world to be a stone of vitality and energy The vitality properties of sulphur are said to bring protection and purification. Sulphur is used in metaphysics to purify and detoxify environments, thoughts, and even the energy fields of people. It can be helpful for purification before magic rituals as well.