Angelic Trio

I found this trio of Angels/Cherubs at a thrift shop last week. I  am not sure what they are made  of? Is this chalkware? Plaster? This is out of my realm of vintage sewing expertise, so if you know what they are I'd love to know. I'm pretty sure they are old- maybe the 1950s or 60s?
Here are pictures of each one- the middle one is supposed to sit on the edge of a shelf.

These will  become a new tradition to decorate for Christmas. Though I suppose they could stay out all year. If you know what these are, please post a comment. Tell me if they were a good deal for $2??