What are these glass things?

My first thought was a hanging light fixture shade. Nothing came up on Google Lens except a lot of freeform glass bowls. 2 of the pictures brought up a lot of breast implants too.

Anyway, they're about 11" across and have 5 glass tabs on the underside. I thought they might be where chains would be attached somehow to hang them. I've bought and sold a lot of light fixtures and never saw anything like this. So, I'm not really sure what they are.

Any help is greatly appreciated!