Am I the only one to find this earth being created under the compass out of chaos looking a lot like a Mandelbrot Set M ?
The image of God using a compass is famous (see for instance the much later William Blake) but this one is curious by the image of the world. It dates from the 13th century in a splendidly illustrated and fastuous kind of Bible digest and commentary called “a bible moralisée” made for royals of France.
Edit 2014/09/18: Alexander and Antti pointed out in comments the similarity with amethyst geodes such as this one
found on Minerals.net.