The hand amulet was designed to sustain dexterity and manual activity1. The earliest are in carnelian, but other materials were used1. Position on mummies: wrist. Production covers all dynastic times
References
1Andrews C. Amulets of ancient Egypt, 1994, p. 70
2in Plate I n°14 of Petrie W F M. Amulets, 1914 are two unretrievable hands side by side in blue glaze of Dynasty 6




