Discovered : in the Middle Ages by an unknown alchemist Origin : From the Greek 'anti monos', not alone, and the symbol from the Latin word 'stibium', mark, because the ore stibnite (antimony sulfide) was once used as mascara. Description : A semi-metal used in industry to harden other metals. It was earlier used in the production of bells and metal type. It is a fairly rare metal and the main producing countries are China, Russia, Bolivia and South Africa. Image : Eye of Horus, the Ancient Egyptian falcon god. See also Alchemical Symbols.