Author: K. Shirley Editor: Tessa Hanna According to the Royal Society of Chemistry and the Agency for Toxic Substances and Disease Registry, antimony (Sb) is a hard, brittle, silvery-white semi-metal found in the Earth’s crust. It rarely occurs in pure form because it readily combines with other elements, especially sulfur, forming more than one hundred different types of minerals. Antimony is often extracted as part of complex sulfide ores, processed, and refined for industr