gypsy symbols and their meanings - Google Search
The Elements . Elemental Magic and this too will be very helpful with spell casting
Book of Shadows: The four circles are consistent with the four Elements : Air, Earth, Fire, and Water, with the center as Spirit. The octagram has always been a symbol of protection.
wiccan symbols http://whisperingworlds.com/wiccan/wiccan_symbols.php
A table depicting various symbols of witchcraft and paganism with meanings