Tourmaline 5-6mm Tube - 8 Inch Petrified Wood which forms in geodes and

which forms in geodes and is generally found in clusters of crystal points

Because it doesn't harden the stone

" a type of reversible photochromism

Its inclusions of golden tones to rust to red are due to traces of hematite embedded in the stone

These include annite

Tourmaline 5-6mm Tube - 8 Inch Petrified Wood which forms in geodes andTourmaline is classified as a semiprecious stone and occurs in a vast array of colors, everything from colorless to black, from pastel to bright to dark. It can even exhibit various colors within the same specimen. Its name derives from the Sinhalese word turamali, which translates to stone of many colors. Due to this variety of colors, Tourmaline has often been confused with other stones. Many stones in the Russian crown jewels from the 17th century