Australian Boulder Opal 8-9mm Round Necklace - 15-16 Inch 15-22mm but occasionally gabbro comes in

but occasionally gabbro comes in oranges and greens

while other impurities in the stone may create veining and rich patterns

pink and mauve

ochre browns and deep greens

” Most deep red Carnelian has been heat treated to darken the beautiful orange and red tints that are created by iron oxides in the stone

Australian Boulder Opal 8-9mm Round Necklace - 15-16 Inch 15-22mm but occasionally gabbro comes inBoulder 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. This gemstone strand comes as a complete necklace including a base metal lobster clasp and 2" extender, but you can cut it and