Vintage Lot of Six Small Fossils/Rocks

Description

This is a lot of 6 small fossils/rocks that I found at an estate sale.
Scroll-like one in bottle is very tiny, at 1/4 inch, the larger orange/tan curved one is 1 by 1/2 inch and the smaller orange/tan one is 1/2 by 3/4 inch.
The round gray one is 1 1/4 by 1 1/2 inch and the square gray one is the same at 1 1/2 by 1 1/4 inch.
I'm not sure what they are but thought a collector might like to have them.