Australian Boulder Opal 4mm Round - 15-16 Inch Diamond Cut Rondelle A Grade and the green color is

and the green color is caused by a reaction in the stone when the chrome is introduced to water

a Greek philosopher and botanist who also named the stone

Mother of Pearl is white with an iridescent sheen

is aptly named for its shades of gold

ranging in color from pale yellow to golden yellow

Australian Boulder Opal 4mm Round - 15-16 Inch Diamond Cut Rondelle A Grade and the green color isBoulder Opal is a golden brown to dark brown stone, displaying these colors in patterns of parallel bands. It is considered a precious Opal, and forms within a host rock such as ironstone or sandstone. Boulder Opal is believed to help with spiritual development, as well as with reconciling conscious and unconscious thought.