Australian Boulder Opal 4mm Round - 15-16 Inch Stone Type_Turritella Agate currently believed to be due

currently believed to be due to the presence of a copper-based mineral such as Malachite or Azurite

depositing copper and other elements that gradually develop into turquoise

) Seraphinite is most commonly found in shades of dark green and gray

The name derives from the Greek word for “not intoxicated” and was once believed to prevent drunkenness and overindulgence

It is a particularly unusual gem because it exhibits a special optical property known as "tenebrescence

Australian Boulder Opal 4mm Round - 15-16 Inch Stone Type_Turritella Agate currently believed to be dueBoulder 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.