Sulfur Crystal Formation - BoliviaSulfur is an abundant bright yellow chemical element with the symbol S, and its atomic number being 16. It is the tenth most common element in the known universe, and the fifth most common on Earth. Sulfur has been used for a variety of purposes since the ancient days of China, Greece, India and Egypt. It is commonly called "Brimstone" in the Bible. Sulfur is essential to all living organisms as minor amounts exist in body fluids, fats and skeletal