The 100th volume in this highly successful and renowned Patai and Rappoport series ‘The Chemistry of Functional Groups’ is fittingly devoted to the precious metals, gold and silver.Gold is a soft metal occurring naturally as particles in quartz or as nuggets. Gold was initially used extensively in coinage and jewellery and has recently found applications in biochemistry, medicine and material science. Gold readily forms organometallic compounds (R-Au-L with L = sulphide, phosphine and isocyanide), oxides and halides. Silver is a ductile metal which was used in coinage and for mirrors. It is now used for jewellery, electrical conductors, dental and surgical components.