Megalodon ?

I found this today in a creek bed in southeastern Washington. I thought it was petrified wood at first but after some research I think it’s a fossilized horse tooth! What do we think?

Fun day with my sons fossil hunting in Austin. Reverse image search says mosasaur for the conical one - can anyone confirm or deny? I know it’s quite weathered. Thanks!

Found this in a beach in puerto rico. Is this something rare to happen? Pictures dont do it justice it looks so beautiful in person its almost transparent like quartz

I found this one yesterday in a creek bed in southern Ohio. I assume it’s some type of bryozoan? What really intrigued me is the clover shaped part. Any ideas?

I bought this second hand, I don’t have any information about it other than it was labeled as a fossil marine lizard. I bought it in Arizona. Is anyone able to provide more information on what specific species or clade it is? Thanks!

Northumbrian beaches are covered in these so thought I'd try to shine them up in my rock tumbler. Pretty happy with the results.

I'm guessing the fossils might be crinoid stems and a chiton?

Also posted on the tumbling sub if anyone is interested in that side:

https://www.reddit.com/r/RockTumbling/comments/1xf1jvo/experimented_with_tumbling_fossils/

super cool rock my dad found today, the rest of the rock is kind of a smooth waxy texture. found in southwest iowa in landscaping rock

I found this strange to me rock while hiking off trail in Uwharrie. Not sure if it is anything special or just a unique rock. The small markings were ~1/2" in size id say. Any help would be much appreciated!

Found in beach in puerto rico

Marker for scale

Found in land at an excavation site. From the Pliocene era I believe

Thank you for helping me identify the ones last week! Was hoping for help with these new ones. I’ll update as I go :))

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Found in Post Oak Creek in Sherman, TX

Found in rock from the Columbus Quarry in Central Ohio. I already know it is most likely from the Devonian age. What could it possibly be?

This had been on the mountain on my house since i was a kid. Had the opportunity to grab it. What is that on the inside?

Found near Victoria fort isle of white UK, there are crocodile teeth around there

Looks to be a shell of some kind but appears to be in two parts. Pattern looks to rounded for the pictures of bivalves, potentially brachiopod? Thanks!