This amulet represents the two hills of the eastern horizon with the rising sun in between. It granted the wearer to be united with the sun god and with a daily rebirth. Such amulets are mostly in red stones and faience1. They were produced from Dynasty 26 onwards1

Red glaze
L 1.7, H 1.4, T 0.3
Late Period
© The Trustees of the
British Museum #EA8295

Porphyry, flat back
suspension loop broken
H 2.0, W 1.5, T 0.6
Late Period
Private collection DA

Unusual in white glass
L 2.2, H 1.5, T 0.3
Ptolemaic Period
© 2009 Musée du Louvre/
Georges Poncet #E 2240

Reference

1Andrews C. Amulets of Ancient Egypt, 1994, p. 89 and Fig. 90e