Australian Boulder Opal Faceted 5mm Round - 15-16 inch 48hr_09092025 manganese and other metallic oxides

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

mined since 4000 BCE

also known as Amazon Stone

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

Australian Boulder Opal Faceted 5mm Round - 15-16 inch 48hr_09092025 manganese and other metallic oxidesBoulder 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.