acorns

Hi, I ordered red oak acorns from etsy and when I did a float test I see all of them floating. While checking online resources if the acorns float then they are bad, can some share your thoughts about it. I don't see any particular holes on it though. Attached is the picture. Thank you.

Not sure if there's any interest, but I have access to several oak trees with loads of acorns. There is Live oak, buckley oak (its a beautiful delicate red oak), Mohr oak (similar to grey oak), post oak, blackjack oak, and an interesting hybrid of buckley and blackjack oak ( hastings oak) and...