Round shaped rock??

[tattooedmomma]

Is it a shooter for marbles? My son found this in sacramento ca.

 

Amazon Forum Fav 👍

Upgraded Night Vision Monocular Digital Infrared Monocular Telescope for 100% Darkness with 8X Zoom - Grab it through Amazon!

[oneeye]

I have one like it found here in Michigan. I will post a pic of it this evening.

 

[Eu_citzen]

Concretions? (spelling?)

 

[oneeye]