"Things You Wouldn't Know If We Didn't Blog Intermittently."
I hope that was taken from an Elephant or whale. Yikes.
Apparently the little ones, sand grain type, are more painful. The big ones don't try to go anywhere, so they are less problematic generally.
This is a jackstone. Always interesting to see on cat scan.
Added to the title. Thanks, Nach.
Red color comes from Fe(II) ions. Calcium oxalate is white.