I thought this was a post oak acorn what y'alls opinion?

If we cant identify a tree looking at the bark and leaves, theres not much chance were gona be able to identify a single acorn. But im sure youll get some opinions. Ill go with you and say post oak.

Looks like a Southern Red to me, or maybe a Blackjack or Water. Bark and leaf would help.

I’m gonna generalize n say a red oak acorn

It's to big for a water oak it's about the same diameter as Quarter. I couldn't find the tree then came from or I would have posted bark and leaf pictures. I found these around a bunch of white oaks and some hickory trees. I thought It might have been an odd ball off the white oaks since the dia. is almost the same of a white oak and there were a plenty of white oak acorns there but there to many of these kind of acorns laying there to be an odd ball deformed white oak

Same diameter as a quarter , that's a fat acorn. Sure doesn't have any characteristics of a white oak to me. Even in dry years they'd fill out more than that. I'm stumped.

Chesnut

Overcup?

Noo, not overcup. Have you opened one to see if it's red or white inside? Stob, overcup has very little cap actually showing.

Chestnut oak acorn usually lose their cap and are way longer than that. I don't see many overcups , but don't look exactly like I remember them, may be though. I'm all in, lol.

AUCoonhunter will be along and straighten us out soon enough.

I haven't opened one I only brought the one home with me mainly because I forgot I stuck it in my pocket till I got home and was emptying my pockets. The way the shell is covering it and the acorn being short made me think it was post oak but its dia. Makes me think it's to big to be post oak. I'll split this one open in a min and post a picture

Scarlet oak

I concur. May be wrong, but they will look like that.

Cut it open and it was a no go worm don't got it the innards perch

Black Oak? Did all the acorns look like this one?

Judging by Google pictures it the nut resembles a scarlet oak but the size is to big. More googling leads me to believe its eastern black oak going by the acorn dia. And length , and the cap.

Here's a link see what you think.
http://www.bio.brandeis.edu/fieldbio/Clapp_Hansen_Siegel/Pages/Black_Oak.html

I have no idea. Its on my bucket list to learn all these. I want to learn more trees too. I have a long way to go. Its crazy how many different oak species there are. Mbrock could probably tell ya. Or Fred

Agreed.

Thanks 2Dogs. It is definitely in the red oak family, and may not have fully formed. Best guess would be black oak.