Australian Boulder Opal 4mm Faceted Round - 15-16 Inch Continuity Indigo gabbro is a color

Indigo gabbro is a color variant of the igneous mineral

It has been treasured for its beauty throughout history and used extensively for adornment in jewelry as well as works of art

protection and good fortune

It was used in the Egyptian Book of the Dead

blue or gray

Australian Boulder Opal 4mm Faceted Round - 15-16 Inch Continuity Indigo gabbro is a colorBoulder 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.