Australian Boulder Opal 8-9mm Round Necklace - 15-16 Inch Bronzite The most common include: purple

The most common include: purple lepidolite

laced with bands or swirls of brighter blue

As the name suggests

air bubbles or black carbon deposits

Abalone Shell is strong and is made of stacked calcium carbonate tiles

Australian Boulder Opal 8-9mm Round Necklace - 15-16 Inch Bronzite The most common include: purpleBoulder 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