I would've called this portrait a tintype, but embossed into the metal it says: "Melaino type plate for Neff's Pat19feb56.
I think it says "56" at the end, it is hard to read. So this is not a tintype, it is a Melaino Type.
The face has been tinted, the jewelry painted gold.
No idea who this is or why she is in the Reeves Family Album.