A pentacle (also spelled pantacle in Thelema, following Aleister Crowley)[1] is an amulet used in magical evocation, generally made of parchment, paper or metal (although it can be of other materials), on which the symbol of a spirit or energy being evoked is drawn. It is often worn around the neck, or placed within the triangle of evocation. http://en.wikipedia.org/wiki/Pentacle Protective symbols may also be included (sometimes on the reverse), a common one being the five-point form of the Seal of Solomon, called a pentacle of Solomon or pentangle of Solomon.[2] Many varieties of pentacle can be found in the grimoires of Solomonic magic; they are also used in some neopagan magical traditions, such as Wicca, alongside other magical tools.