The beautiful dark avocado green Turquoise gemstone in this ring came from the Tiffany Mine in Tonopah Nevada, USA. It is a unique color going from dark to light green with a hint of brown throughout. This special and limited turquoise stone has Fine silver on the sides and back. The bank is Sterling Silver. The stone is approximately 1-1/4″ x 1″. The ring size is approximately 10.