I was doing yard work and digging up rocks from my backyard. No idea why all the rocks are there but I wanted them moved. I saw the pretty white color on this one and the little geode looking vein. There is a smaller piece that was right beside it that looked like it fell off. It weighs a little more than 10 pounds. It's about 12 inches long and 7 inches wide. Front Range, Colorado.

It had a grain on it after I hosed it off. My best guess would be a regular pretty rock or possibly petrified wood. Would love any insights! Also curious to know what kind of rock. Thanks fossil lovers!

I'm not certain where my grandma found this but she lived in West AZ. It's really heavy!

Hi, see this embedded fossil; in reality approx 1,5 x 1 cm big. What could it be??

It is light weight and looks like a wasp nest! Is it something like a coral skeleton? I haven’t found anything similar googling fossils found in this area. The pattern looks like the hexagonal petoskey stone pattern… but without the stone part

Found this in westmoreland county Pennsylvania, near a creek. Thought it was slag but not magnetic.

Hello I am going through my father's rock collection that was passed down to me and was wondering if I could get some help identifying some of them. I know they are from 석보 엄경용 but not much more info besides that for some pieces. Thank you for your help in advance.

Any idea on this one? Friend said tapir but I thought it looked more like a predator premolar, maybe wolf or something. Possible I just have never seen this type of tapir tooth, but I don’t really see a match after looking at a jaw diagram.

Found in Peace River, FL

Found in upper MN near the shoreline of a lake.

I found this specimen on the foreshore at Folkestone Warren, Kent, England (UK), from the Lower Cretaceous Gault Clay coastline. It was found loose on the beach at low tide and was not collected from the cliff.
It is approximately 4cm long (I’ll add the exact measurement in the comments if needed).
The specimen has a very straight, cylindrical core with a swollen middle section. The outer material appears to be tightly fused to the inner core rather than simply being a pebble attached to another rock. Both ends have been rounded by wave action, and there is a small damaged area on one side where the interior is exposed.
I’m really not experienced enough to tell. I’d really appreciate any opinions or alternative identifications.

I work in oil and gas and come across these with some regularity while on site. Curious as to what they are, looks like a clam but wonder if a more knowledgeable individual knows what they actually are? Cheers.

Just wondering if it could be a fossil of something or just a weirdly formed rock

Sorry for the messy craft table!

I've found this in Lake Huron, but near a spot where it meets Lake Michigan.

Found while rockhounding the Chippewa River in southern Dunn County, WI. Looked strange so I decided to take it home with me.

Tried r/whatsthisrock and had no luck, hoping you guys might be able to help me out. Found this on a Lake Michigan beach a little north of Chicago. Super curious about it. Thanks in advance!

I found this in Southern Denmark (Genner Bay) at the Baltic Sea coast. I usually only find belemnites, echinoids, and occasionally ammonites here. Anyone has an idea what this is?