🔎 UNIDENTIFIED ID help Ozarks rocks

[maccounty]

Found these in the creek near my house, Southwest Missouri, McDonald County. They appear (to me) some type of quartz. Kinda like a brain if that makes sense. The bubble one I haven’t really noticed before, (first two pictures and seems different than the others) very interesting and wondering how them bubbles formed. I haven’t cleaned any up yet, they are as found. Just trying to figure out what they might be. Any help is appreciated. Thank you.

 

Amazon Forum Fav 👍

Family Maps of Hinds County, Mississippi, Deluxe Edition - Grab it through Amazon!

[DizzyDigger]

I've no idea what they are, but think I probably would have brought them home, too. Cool looking rocks!