Shells can be many things. I like to offer them to Poseidon to show my gratitude. You can even use shells as divination tools. Write something you want to let go of on a seashell—a person, a job, or even a thought. During the waning moon, toss the shell into the ocean. Walk away and don't look back. Water rules the western direction. Seashells symbolize the treasures hidden deep beneath the ocean's surface. When casting your circle, place seashells in the western corner. In love and attraction spells, the Element of Water rules emotions and matters of the heart. Include a small seashell in an attraction spell.