Coloured examples (blue, green or red, colours of regeneration) are very rare1. Both below are pierced for attachment on mummies’ bandages. The headrest with a Bes head is also a rare variant1

Red jasper
W 1.9, H 1.2, D 0.4
Late Period
Private collection DA

Blue glaze W 2.5, H 1.2, D 0.6
Undated World Museum
Liverpool #M11969d

Faded green glaze with Bes head. W 5.4 Late Period Bonhams Antiquities sale 11597, lot 37, 25 April 2005

References

1None, Unpublished amulets