Does anyone know...

[gem]

Sara, having agonized over similar details in online images myself (anyone remember my "partlet or necklace?" thread about Promenade?), I would say hunt around until you can find a good reproduction in a book.  Chances are the details will be *much* clearer in print.  I finally found detailed color repros of Promenade in that book I got from France via interlibrary loan--and I was able to take Milord's magnifying glass for studying coins to get an even closer look at some of the details.  It did take a little effort, though, to find a trail that would lead me to a book with those pictures... since *this* began life as a book, it will probably be easier for you!

This period is a little frustrating, because they hadn't yet developed the idea (or the skills) for photographic accuracy, so it's really hard sometimes to tell what they were seeing/thinking/doing, even if you *do* manage to get a good image to work from.  And then you just sort of have to decide what seems most likely, mixed with what's the most practical way to re-create it.

[NicoleBridget]

I'm no help here I just wanted to pipe in that it looks like a little acorn hat with a veil!  I can picture fairies and elves wearing it.  That is all, sorry to disturb...