This is a very high quality, completely polished Agate Eye stone from India! Agate Eyes (Third Eye Agate/Shiva Eye Agate) are natural Agate stones with concentric banding of different colors in a circular pattern.  These beautiful stones wash up on a riverbank and are carved into the shape of an eye! 

These valued crystals have long been believed to provide protection against evil, enhance psychic abilities, intuition, extrasensory perception, imagination and concentration!