Vintage Dangle Earrings -- Mystery Stones

Hi!

I hope the pictures are good enough for someone to help me.. I have been busting my brain and wearing google out trying to figure out what kind of "stone" is in the black dangle earrings. They look pretty dang old, but who knows. They are bezel set with some sort of matt black stones. Wow! any help would be appreciated : )

The second pair I am not sure of either. So any input on those to would be appreciated as well : )

I believe they are both set in sterling, no markings.

Thanks you guys in advance
Pam