Gold is a chemical element with the symbol of Au from Latin word Aurum and atomic number is 79. It is slightly orange-yellow, dense, soft, malleable and ductile is nature. Chemically, gold is a transition metal. It is one of the least reactive chemical elements that's why it found native state in earth as nuggets or grains in rocks, veins and alluvial deposits. It occurs in a solid solution series with the native element silver, naturally alloyed with other metals like cupper and palladium and mineral inclusions such as within Pyrites.