Sulphur occurs in soil and rocks on the form?

Sulphur occurs in the soil and rocks mainly in the form of sulfides, sulfates, and elemental sulfur. Sulfides are minerals with sulfur combined with a metal, like pyrite (iron sulfide). Sulfates are salts containing sulfur and oxygen, such as gypsum (calcium sulfate). Elemental sulfur can also be found in its pure, uncombined form.