I don’t know if this was used for poison or perfume or something else, but there is an obvious hinge. This was sold at Christie’s in a lot of 3 gold rings for $27,000. I wish they had included a picture of the compartment opened up, but they did not. The stones were not identified in the listing but I would guess garnet based on the color and fracture pattern.
I found this because I am curious about how ancient poison/ secret compartment rings were constructed (and whether the hinge was well hidden or not). If anyone has links to other examples like this please let me know!
by cutiepie694