Look at these amazing geometric patterns! They're from the beach at Bolinas, CA. In 1. the rocks absorb the incoming tide in little lines which must be fractures too small to see. It looks like tree branches. In 2. the very regular geometrical patterns in semi-translucent rock make a beautiful mosaic. In 3. a slight crevace looks like it is warmed by hot coals but is actually orange patterned stone. Don't you just love rock?