A Double Terminated Crystal is a crystal with two naturally faceted ends. It is a rarer form of crystal as it forms free-floating in pockets of clay, rather than on one side of a stone. They tend to be highly sought-after, as those who believe in the power of crystals claim that energy can flow in both directions through a double terminated crystal; this makes them ideal for healing and astral projection, among other applications. They are often made into pendula or pendants.