Anybody know what this is

[jeremiahlowcock]

Looks like a child scribbled on a white rock

 

[DDancer]

Appears to be limestone with bands of silicate running thru it~ usually some form of quartz or chert. The softer limestone erodes away leaving the harder silicate raised on the outside. They are neat stones to find. Just a guess.

 

[jeremiahlowcock]