12-14. Vanadinite #5.
Tiling may seem like a very abstract challenge for some. Nature knows different. This is a front view of a Vanadinite crystal unit cell. A stable and sturdy prismatic hexagonal shell is all that was needed to contain this busy pack of unruly atoms.
It makes for quite an uncommon and beautiful mineral too!
From a resource by S. Hendricks, M. Jefferson, and V. Mosley.