I was under the impression that mourning attire, especially 1st mourning where black collars and crepe were worn, dresses should be a matte black worn with little, or no, trim.
The fabric has a lot of shine and crispness to it, indicating, I think, that it is likely silk.
I'm not sure how to interpret that dark-looking collar frill, anybody have any guesses?
I didn't think first mourning but maybe second. And that brings me to another question. If a woman is in first mourning, wouldn't having your image struck be the same as Scarlet dancing at the Fair during first mourning? I was under the impression that one does not partake in frivolity during first mourning and I would think having your photo taken would fall under that taboo.