Hello all Opal's.
Are you sure your Opal's are the full last name?
I have come across Opal's- still living- in my family line that has confirmed that Opal was actually shorten from Opalewski. Could your Opal's be my Opal's. Mine are from Poland. I also have Opalienski's who are from Poland but have not found any Opal's from that line. If you think there is any chance your Opal's and my Opal's could be related contact me. Mine came from Poland to Chicago.
Good luck in your search.