From a friend in Utah

[MSirmon]

A friend gave these to me and said his mother Found them years ago when they lived in Utah. Other than that I have no idea of their origin. Any help in Identification would be greatly appreciated. 

[ynot]

First piece looks like a horn coral.

Second looks mineral.

[MSirmon]

1 minute ago, ynot said:

First piece looks like a horn coral.

Second looks mineral.

Thanks. Horn coral was my first guess as well but have never seen the smashed looking part like this so second guessed myself. 

[ynot]

2 minutes ago, MSirmon said:

Thanks. Horn coral was my first guess as well but have never seen the smashed looking part like this so second guessed myself. 

The coral is the cone shape, the flater area looks like weathered matrix. It is very worn, probably found in a stream.

[Wrangellian]

I suspect that horn coral is from the Pennsylvanian Morgan Fm of Riley's Canyon, Summit Co, UT.  (if I've got this info correct - hope someone can verify)

They often have some red in them and I've got at least one piece myself.

[Fossildude19]

8 hours ago, ynot said:

The coral is the cone shape, the flater area looks like weathered matrix. It is very worn, probably found in a stream.

I think the whole thing is the Rugose coral. You can clearly see growth lines along most of the specimen.

In the first picture, I can see lines that look like possible blown out septa. 

Looks to me like it was crushed, or possibly bitten.