I think I’ve posted before in the wrong area…hoping this is reaching y’all:
found this in Bexar County San Antonio, Texas in my neighborhood which is new construction. In this area I’ve found a lot of petrified trees and other types of possible water creatures. I’ll attach those pics since I may have posted them in the wrong discussion area..
this looks like a shell of some sort and has beautiful little crystals in the ‘valleys’ of the sunburst pattern..