Tyet

The tyet resembles a knot of cloth and may have originally been a bandage used to absorb menstrual blood.

[2] An early example of a tyet sign comes from a First Dynasty tomb at Helwan, excavated by Zaki Saad in the 1940s.

The earliest examples date to the reign of Amenhotep III, and from then until the end of dynastic Egyptian history, few people were buried without one placed within the mummy wrappings, usually on the upper torso.

[5] Chapter 156 of the Book of the Dead, a New Kingdom funerary text, calls for a tyet amulet made of red jasper to be placed at the neck of a mummy, saying "the power of Isis will be the protection of [the mummy's] body" and that the amulet "will drive away whoever would commit a crime against him.

However, many others were made of green materials such as Egyptian faience, whose color represented the renewal of life.