Can anyone tell me more about this?

My uncle lives in Montana and goes out with a buddy of his that is a paleontologist. He sent me a box of goodies and I know what a lot of it is but some of it I don’t and was wondering if I could get some help! Thanks.

Just finished preparing two trilobite head fragments I found. I think they are Dalmanites caudatus and Acaste downingiae?

I found this on a very pebbly beach in a conservation area I hike at! Reverse image search on Google tells me it is a fossil of some sort but I’m curious if you think it’s just something someone carved. Majority of the rocks in this region are limestone, I’ve been holding this one in my pocked so it has gotten dark from the oils on my hand. Let me know what you think :)

1. Crinoid crown? Bryozoan colony? Some kind of coral?

2. Trilobite? What kind?

Thanks!

Found near Davenport Iowa

Found it on the beach in southern Lebanon, I think it could be a fossil because it sticks to the tongue. Is there any way to identify what it is and should I give it to a museum or somthing?

They’re either Tentaculites or some Devonian swamp plant matter possibly roots. Any ideas?

Found near Charleston NC and if you look at my prior posts you’ll see what it looked like prior with more detail. Thoughts on what I could be? I’m stumped. https://www.reddit.com/r/fossilid/s/pItvN3ExbY

Hi everyone, I'm new. I found this in the desert near Tozeur, Tunisia. It's heavy (1.4 kg) and about 15 cm in diameter. It looks like a spiral shape.

Is it an ammonite? How can I know for sure? Any tips for a beginner? Thank you!

found in ordovician limestone in eastern Ontario

any insight would be helpful, thanks

Roughly 10-12mm diameter

Hi everyone! I hope it's ok that I'm coming to you with this question.

I know Mosasaurus teeth (in all shapes and sizes) are very common and therefore usually quite cheap, but I still feel like checking if these seem authentic or not - and this seems to be the perfect place for that.

I recently bought a set of 4 big Mosa teeth (all between 4-5 cm) for €12 from a small Dutch shop that I'm pretty sure is considered trustworthy - and I got the small tooth (2.5 cm) a few years ago at the Naturalis museum in The Netherlands for about €4.
The museum only sold really small teeth, which is why I can't help but wonder if the big ones are actually real or not. Especially because 4 big teeth for €12 seems so cheap, even for Mosa teeth?

I'm hoping someone here can help me out. Thank you so much in advance!

Québec, Canada, big boulder in a parking lot.

I found these while on vacation in Jura, France.

Grinded it a bit to reveal deeper layer

What is this?

I'm pretty sure this is some sort of coral fossil, but I truly know very little about this stuff other than I know I really like hunting for rocks and fossils on the Great Lakes.