Roman Coin?

Could someone identify this coin and

 date of it?

A photo of both the obverse and reverse along with weight and diameter are needed. All that I can say from this is yes, it's a 3rd century Roman coin. It has a FELICITAS PVBLICA reverse and is most likely a sestertius of Julia Mamaea. With more info it might be possible to attribute an exact date to it.

I will post another photo with weight and size. I could not figure how to post 2 photos and they cover my words. Thank you,                       Weight is 

19.09 grams  measurement is not round, so a little over 1 inch to 1 1/8th inch.

Julia Mamaea AE Sestertius. IVLIA MAMAEA AVGVSTA Diademed and draped bust right / FELICITAS PVBLICA S-C, Felicity standing half-left, arm on column, holding caduceus. RIC 676 Cohen 21.

Thank you for the information.