Never quite noticed this, but after a prop site came up in an Internet search, I discovered the following image...
https://www.yourprops.com/Sacrificial-Medallion-replica-movie-prop-Alien-vs-Predator-2004-YP39331.htmlSeems they crafted a 3D version of the embryonic Queen from the '
Alien 3' posters for inclusion on costumes.
In case any of you don't recognise the scene, it's the historical flashback. The sacrificial maiden was portrayed by Karima Adebibe, who, just two years later, went on to become the official likeness of Lara Croft. Ironic, in that respect, that the first of the AVP films depicted her dying in a tomb other characters would be raiding in the far-flung future.