Star hallmark on old Brooch

by Cindy
(Seattle)

Can you please help me find out who made this or the maker? I will send you a picture.

This is a Diamond or Crystal Brooch my mother gave to me, I don't know any history. it is stamped with a 5 point Star nothing else on the back..I can't find anything on the internet. I have looked for days, The Dove little branch in it's mouth broke off. I intend to get it fixed but before I took it to anyone I would want to know if it is worth fixing it and worth selling?