Australian Boulder Opal 8mm Round - 15-16 Inch Pink due to variations in iron

due to variations in iron content

This is due to high oscillating frequency and thermal conductivity

Argentinian Blue Onyx and Argentinian Aquamarine Onyx

and over time

Aquamarine is a transparent to translucent stone ranging from cerulean blue to light blue in higher grades

Australian Boulder Opal 8mm Round - 15-16 Inch Pink due to variations in ironBoulder 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.