Sulfur mineral may refer to any of the following types of minerals that contain sulfur (S) atoms: Native sulfur, sulfur that occurs naturally in crystalline form Octasulfur (S8), the most common allotrope of sulfur found in nature Sulfate mineral, a mineral containing the sulfate ion (SO42−) Sulfide mineral, a mineral containing the sulfide (S2−) or disulfide ion (S22−)