Vintage Necklace, Bracelet and Earrings Set

I don’t know much about this set other than it belonged to my mother in law, in the 60’s - 70’s. I don’t think it’s silver, but it cleared like silver when I cleaned it. I can’t find any mark for silver. I also don’t know what the stones are. It’s very pretty and it great condition. Dimensions are: 20 in length necklace, 7 in bracelet and 2 in earrings.