From Spell Crafts by Scott Cunningham & David Harrington

Shells can be found on beaches throughout the world. The following list is rather short, due to the great variety of shells. For best results, use shells that have washed up on beaches; those commercially available may have been harvested, their inhabitants killed, and then sold. These

shells are of lesser value in magic and those that use them may wish to say a rite of release for the shell's creators. The colors of the shells can be kept in mind when determining their magical uses.

ABELONE:

General use. Use to contain empowered herbs, stones, and other magical objects.

"CLAM" SHELLS" Used for purification and love. A small clam shell may be etched with a rune and made into a potent talisman.

CONCHES: Love magic.

CONE SHELLS: Used in protective spell crafts.

COWRIES: Cowries are specific tools of prosperity and money; many cultures once used them as money. Some contemporary religions associated cowries with goddesses and with female mysteries. In this respect, they're fine for enhancing spirituality.

LEFT-HANDED WHELKS: Use for making dramatic, positive changes in your life.

LIMPETS: Courage, confidence, physical strength.

MOON SHELLS: Psychic awareness, purification, and peace.

OLIVE SHELLS: Healing.

OYSTERS: Love and good fortune.

TOOTH (Dentalium) SHELLS: Money.

SAND DOLLARS: Wisdom.

SCALLOPS: Useful for spells involving travel and movement.