Fossil Coral 12mm Coin 8-Inch Blue Chalcedony The stone's composition remains somewhat

The stone's composition remains somewhat ambiguous

Rainbow Obsidian is known as a grounding and protective stone

Tourmaline is classified as a semiprecious stone and occurs in a vast array of colors

It occurs with wave-like bands of charcoal gray

intricate patterns of minute black flecks

Fossil Coral 12mm Coin 8-Inch Blue Chalcedony The stone's composition remains somewhatFossil Coral is the prehistoric fossilized remains of the invertebrate reef builders that live in tropical oceans. Silica rich waters create hardened deposits that preserve coral skeletons, resulting in fossils that are chalk white, tan, gray, and brown as well as pink, red and yellow orange.