Australian Boulder Opal 4mm Round - 15-16 Inch Diamond Cut Rondelle A Grade The mineral is named for

The mineral is named for the place where it is principally found

It's soft chatoyancy is reminscent of the moon's light

Mother of Pearl is white with an iridescent sheen

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

is aptly named for its shades of gold

Australian Boulder Opal 4mm Round - 15-16 Inch Diamond Cut Rondelle A Grade The mineral is named forBoulder 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.