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manganese and other metallic oxides captured during the forming of the rock
from deep oranges to creamy off to white tones
in a variety of swirling and linear patterns
a mineral of the Quartz family
mined since 4000 BCE
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.
