Signed Cameo, Rosa perhaps, help identify signature

Hello gain,
I am posting this on behalf of an acquaintance, everyone started buying signed cameos now, lol.
He wonders if anyone can recognise the signature, I know is acid signed, but the frame looks a bit older to me.
Another cameo he has, is black, he shined a light through it and is opaque. Can it be onyx and does anyone recognise the depiction.
Thank you.
Kind regards,
Simona
@PepperAnna @Bronwen

 

The black one looks very modern.
You can have a cameo made in Torre del Greco after a photo of yourself or a loved one. I suspect this is one of those, so you may never know who she is.

 

The first one, which I would put to the first third of the 20th, looks to me like it has the initials AV. Doesn't ring any bells.

The second one does appear to be hardstone, no doubt treated to have such a black background & may have been cut with ultrasonic assistance. As AJ has already observed, it is quite modern.

 

Thank you so much, I have passed the message to them.
I have never seen teeth in a cameo, that was a first, thank you again for enlightening me.
Kind regards,
Simona