Aunt Sabina's brooches -- the pearls

More brooches gifted to me when my Aunt Sabina passed. I call this bunch the pearl collection. None of them have any markings but as always I am curious to learn about them. I guess in the back of my mind I think about how I would split up my vintage collection when I no longer wear/need them. I have two daughters so I would hate to give all the Weis (for example) to one daughter and all the "garage sale finds" to the other.