The patterns in nature we see at large scale; mountains, valleys, river deltas, clouds, and ocean waves, can also be observed at a much smaller scale in rocks.

The ring in this photo features merlinite, a type of white agate with small black dendrite inclusions of psilomelane.  Our brains may see a familiar pattern of a snowy scene.  Scan the close-up images of rocks on this page and see what your brain finds.