Obsidian Bracelet with Evil Eye Charm The term is being used

The term is being used more often the describe lower-grade specimens to increase their appeal

One of the world's most famous pieces of spinel jewelry includes the Black Prince's Ruby

Opal is a form of amorphous silica

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

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

Obsidian Bracelet with Evil Eye Charm The term is being usedStone: 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