thank you, needed an idea of where to start and i appreciate it so much

some certainly not costume, all is at least 50 yrs old, some closer to 100 just need someone to tell me not to put it in a yardsale!!!

will someone who has knowledge let me know what to do with 100 year old jewelry, possibly costume, and maybe 25 years younger than that ? Where do i take it to find out if it is valuable or not?