Turquoise forms when water percolates through mineral deposits containing aluminum, copper, zinc or iron, a chemical reaction which can take millions of years to occur. Furthermore, depending on natural conditions it can be produced in several variations of colours and vein patterns. The majority of turquoise appears blue due to concentrations of copper and aluminum, however Chinese and Tibetan variations also possesses iron which makes the stone appear more green. The name ‘”Turquoise'” derives from the ‘Turks’ who first introduced the stone to the Europeans.
Australia, U.S.A, Mexico, China, Tibet