Australian Boulder Opal 8mm Round - 15-16 Inch Pakistan as well as a lucky

as well as a lucky stone for sailors

cacoxenite

commonly known as Limestone

The two most popular classes of Australian Opal are Black Opal mined in Lightning Ridge and Fire Opal

The best available information indicates that the stone is a type of Dolomite that has been altered by volcanic activity

Australian Boulder Opal 8mm Round - 15-16 Inch Pakistan as well as a luckyBoulder 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.