Silver sterling amulet (approx ) with a white moonstone set into the serpent head. NM in custom box.
 
This amulet is dedicates to the the Goddess Hekate (often represented with the triple moon) and one of her familiars, the Toad. Some occultists associated the toad bone rite and the Water of the Moon to Hekate, Queen of Witches, Mistress of witchcraft and sorcery.

The triple moon can also represent the 3 sojourn of the Toad Bone Rite : forest, cimetery and stable.