Brooches Galore

I am in the process of sorting through my jewelry, and have come across these interesting pieces that I am trying to figure out. I'd love your thoughts. I suspect that the large gilded one is Ottoman (which kind of stones would have gone in the tiny prongs, do you suppose?). The others are a mystery to me.

Thank you for your help!

 

I am not seeing Ottoman. It has a sort of Etruscan/Greek Revival look, but the stone looks too recent, and the dangles seem to have flat or hollow backs? Maybe ca 1970 artisan made, likely suspect Greece?
Your pics are pretty small, making it difficult to see detail. Could you post closeups of the front and back of the disc and of the dangles?