Tigers Eye is formed when quartz replaces crocidolite (blue asbestos) forming a Chatoyant stone. As the crocidolite decomposes, iron is exposed and oxidized transforming it into limonite, so tigers eye is essentially limonite quartz. The chatoyant nature of bending light is due to fibrous crystal formation and is therefore a metamorphic rock. Tigers eye has been used in many civilizations to protect soldiers as well as warding off evil. Combining earth energy with energy from the sun, it creates a high vibrational state. Helps with self-worth, self-criticism and blocked creativity.