Petoskey Stone is a type of fossilized colony coral found only in Michigan, USA, the coral living during the Devonian period about 350 million years ago when Michigan had a warm inland sea. Because of the "eye" type configurations it shows especially when polished, it is said to mystically help stimulate the third eye and psychic awareness. Petoskey Stone is also said to keep naughty spirits from channeling incorrect information or interfering with one's life. In particular, as far as awareness, Petoskey Stone is said to enhance awareness of the emotions, which can be a boon for dealing with emotional issues. It is also said to clear out negative energies from the aura and the environment. Additionally it's said to be a boon to creative expression of all kinds. Traditional healing folklore and crystal healing lore purport that Petoskey Stone is helpful for healing eyes, head, infections, infectious disease, lungs and skeletal system. Petoskey Stone is related primarily to the third eye chakra as well as the crown chakra.