UPDATE: we found Mama - thank you for the quick and copious response :)
I am so glad I asked: I just knew it belonged somewhere specific.
Finally finished the baseplate (obviously haven't oxidized and brushed, etc) for the ring I began weeks ago: I had a hunch that this belonged to some very specific and so, before I size the band, I wanted to put the call out there
as this gorgeous
Laguna Agate and Peruvian Pink Opal ring asks,
"Are you my mother?"
Convo me if you are!