Yeah, but if you look at the back of the item, along the left edge there are some sort of solder-type marks where it looks as though something has broken off. I’d say jewelry, but they appear to be on the wrong edge.
Not the “wrong edge”; anything goes in jewelry. It is, after all, for show.
When I saw those fractures I thought of broken solder joints, which may have held a chain or more dangling from the bottom. I have brooches like this in the modern day.