Australian Boulder Opal Faceted 5mm Round - 15-16 inch 48hr_09092025 and the green color is

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

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

from deep oranges to creamy off to white tones

also known as Amazon Stone

Australian Boulder Opal Faceted 5mm Round - 15-16 inch 48hr_09092025 and the green color isBoulder 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.