This is a Goddess Moon crystal grid made out of Birch wood. This is just for the grid, stones may be purchased separately.
The triple moon is a Goddess symbol that represents the Maiden, Mother, and Crone as the waxing, full, and waning moon. It is also associated with feminine energy, mystery and psychic abilities. You often see this symbol on crowns or other head-pieces, particularly worn by High Priestesses.