In the Golden Dawn magical system, the Earth Pentacle is one of four elemental "weapons" or tools of an Adept. These weapons are "symbolical representations of the forces employed for the manifestation of the inner self, the elements required for the incarnation of the divine."[6] Other pentacles for the evocation of spirits are also employed in the Golden Dawn system; these are engraved with the name and sigil of the spirit to be invoked, inside three concentric circles, having painted on their reverse a circle and cross like a celtic cross.[7]
According to Aleister Crowley's instructions for the Ordo Templi Orientis, the pentacle is a disc of wax, gold, silver-gilt or Electrum Magicum, eight inches diameter and half an inch thick; the Neophyte should "by his understanding and ingenium devise a symbol to represent the Universe", and engrave this on the disc.[8]
There is, therefore, nothing movable or immovable under the whole firmament of heaven which is not included in this pantacle(this spelling= Thelema), though it be but 'eight inches in diameter, and in thickness half an inch.' Fire is not matter at all; water is a combination of elements; air almost entirely a mixture of elements; earth contains all both in admixture and in combination. So must it be with this Pantacle, the symbol of earth.
I was starting to pick it up the other day, thumbed through it, and thought: Oooook. this one's gonna have to be taken like any book one would consider of learning material - with *tests attached* eeeeks! LOL 
