Elemental Sulfur:

* Native Sulfur: This is the most common form, found as deposits in volcanic areas and in sedimentary rocks. It's often found as bright yellow crystals or in amorphous masses.

* Sulfides: Sulfur combines with metals to form sulfides, such as pyrite (FeS2), galena (PbS), and cinnabar (HgS). These are important ore minerals for various metals.

* Sulfates: Sulfur combines with oxygen and metals to form sulfates, such as gypsum (CaSO4 · 2H2O), barite (BaSO4), and epsomite (MgSO4 · 7H2O). These are found in various geological formations.

Combined Sulfur:

* Organic Compounds: Sulfur is also found in various organic compounds, like proteins, amino acids, and vitamins.

* Gases: Sulfur dioxide (SO2) is a common volcanic gas and a major air pollutant. Hydrogen sulfide (H2S) is a toxic gas that can be found in natural gas and geothermal vents.

Overall:

Sulfur is a relatively abundant element on Earth, and it plays a crucial role in various geological, biological, and industrial processes. Its state in nature can vary greatly depending on the specific environment and the other elements it is combined with.