Undescribed amulets by both Petrie and Andrews were found in Naqada I-II burials, some lying along the forearm of the body with remnants of leather or thongs at bottom notches1. They have a triangular face, inlaid eyes (and nipples for a few, suggesting that women were also intended), and are in ivory, bone and stone1
Bone unusual female
wearing necklace, base broken and inlays missing
H 3.9, W 1.6, D 0.8
MET #23.2.19
Pink Limestone
inlaid eyes missing
H 4.0, W 1.9, D 1.1
Naqada II
MET #10.130.1187
Broken ivory, inlaid eyes missing, notched at bottom for leather attachment H 6.0, W 2.8 T 0.7 The Oriental Institute of the University of Chicago #E10695
References
1Whitehouse H. Ancient Egypt and Nubia in the Ashmolean Museum, 2009, Oxford, pp. 3-4 with illustrated bone and siltstone inlaid examples