Please help me identify these vintage necklaces and bracelet

by Don Goodenough
(Hastings, Mi USA)

I bought these from a lady that told me she received them from her grandma's estate. Her grandma was born in late 1800's and passed better than 30 years ago. She said they were 1920-30's. I am ignorant to vintage jewelry. I have posted on a couple facebook sites with only comments of how beautiful they are. I would love to know if I should save them or give them to my granddaughter for dress up. Thank you so much.