Rare variants were made in precious metals, peculiar glass, and semi-precious stones, barely used for such representations

Inscribed electrum hm vase relevant to Bastet
H 1.7, W 1.2, T 0.4 Dynasty 22
© 2002 Musée du Louvre/Christian
Décamps #E 11345

 Shaped glass on copper mandrel imported from the Near Eastern1
H 2.1, Ø 1.2 Roman Period
Private collection DA

Amethystine quartz miniature situla
H 3.5, Ø 2.4
Nubian, Napatan Period
MFA #21.306

References

1Unpublished amulet, for parallels see Le Louvre #E 23609 and #E 23610