Obsidian Bracelet with Evil Eye Charm Chemical Formula: R3R2(SiO4)3 (R =

Chemical Formula: R3R2(SiO4)3  (R = Various elements that contribute to the species of garnet

and gray hues

an area known for the other famous blue stone

It is a hydrous calcium sulfate that is found in many places on earth

The amount of cobalt contained within the specimen usually determines how pink the specimen is

Obsidian Bracelet with Evil Eye Charm Chemical Formula: R3R2(SiO4)3 (R =Stone: Obsidian Bead: Round 6mm Average Length: 7 in. Obsidian is a naturally occurring form of volcanic glass. Obsidian forms as lava cools very rapidly and is not considered a mineral as its lacks any form of crystal structure. It is said that obsidian is actually a mistranslation from Pliny the Elder's Natural History. The first spelling of the word was obsian. Obsidian has been used to make surgical blades and arrowheads throughout history because