Brachiopoda Fossil
Seems to be in good shape. Looks like a pair of angel wings.
With the side to side about the size of 2/4 Height top to bottom the size of a quarter Width is about 3/4 of an inch
Other
Yes
Brachiopoda Fossil, possible Mucrospirifer thedfordensis
Paleozoic Era (543 to 248 Million Years Ago); possible Devonian (395 million years ago)
Unknown excavation source; possible Central North America
Brachiopods are marine animals that, upon first glance, look like clams. They are actually quite different from clams in their anatomy, and they are not closely related to the molluscs. They are lophophorates, and so are related to the Bryozoa and Phoronida.
Although they seem rare in today's seas, they are actually fairly common. However, they often make their homes in very cold water, either in polar regions or at great depths in the ocean, and thus are not often encountered. There are about 300 living species of brachiopods.
Your example could be from the Plaeozoic Era. A time of mass extinction that wiped out a vast number of species. This event paved the way for the rise of the dinosaurs during the Mesozoic Era.
Example measures .5" H X .75" W. A fairly common , but unique specimen; free of surrounding matrix and appears to have no surface polishing or repair work.
