The breast amulet is extremely rare and was presumably designed to sustain lactation. Position on mummies: breast1. Late Period

Blue glaze with black nipple
Ø 3.7 Ptolemaic Period
© 2017 University College
London LDUCE-UC #38468

Blue glaze with black nipple Ø 3.0
Roman Period
World Museum Liverpool
#11.10.98.115.10

Stone with enamelled
brown nipple2
Ø 3.6 Late Period
Private collection

References

1Petrie W F M. Amulets, 1914, p. 10 and Fig. 8b
2Cohen G. Les amulettes égyptiennes. In: L’Œil, Revue d’Art, n°357, Avril 1985, Lausanne, Suisse, p. 27, Fig. 14