No dimensions.
Bizarre.
I’m for signaling and scaring off predators.
Women have been wearing makeup a loooooong time.
I’ve seen a pic of a 7000 year old obsidian hand mirror that probably came from the same general area but was excavated I forget where in the Near East. It would work welll and look at home in a modern bathroom. It had some signs of wear, could use a polishing. :^) It was probably in a 1960s survey book by the late James Mellaart, despite that, probably not a fake. ;^)
Signaling was my first guess
Al Goes original internet routers, used light without fiber optics, very advanced technology. Ask any dimocrat.