Tyet

The tyet is an ancient Egyptian symbol of the goddess Isis; its exact origin is unknown. In many respects the tyet resembles an ankh, except that its arms curve down. Its meaning is also reminiscent of the ankh, as it is often translated to mean “welfare” or “life.” It seems to be called "the Knot of Isis" because it resembles a knot used to secure the garments that the Egyptian gods wore. The meaning of "the Blood of Isis" is more obscure, but it was often used as a funerary amulet made of a red stone or of glass. It is also speculated that the Tyet represents the menstrual blood flow from Isis' womb and its magical properties.