Australian Boulder Opal Faceted 5mm Round - 15-16 inch 48hr_09092025 in a variety of swirling

in a variety of swirling and linear patterns

manganese and other metallic oxides captured during the forming of the rock

a mineral of the Quartz family

also known as Amazon Stone

iron or manganese imperfections

Australian Boulder Opal Faceted 5mm Round - 15-16 inch 48hr_09092025 in a variety of swirlingBoulder 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.