Tourmaline 8mm Faceted Round Large Hole - 8-inchTourmaline 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

its coloring is the result of the chemical reaction that occurs when copper is introduced to water

initially as tools because of its hardness

” owing to its red appearance when sliced thinly or powdered

This species is formally identified as Gliricidia sepium and can be found by different colloquial names in various parts of the world

everything from colorless to black

Nangka is the name commonly used in the Philippines for the Jackfruit Tree

red and gray in swirling circular patterns

Additionally

The mines these stones are sourced from are primarily copper mines

gray and black

in a variety of swirling and linear patterns

Sard is not Onyx