Ionic Polyhedra technique.
If you would like to learn how to weave beaded beads like this one, I have a pattern that shows how to make 14 other beaded beads using this technique. This particular shape is not covered in my pattern, but if you make a few of the other designs in the pattern first, you should be able to figure it out with a little help from this wikipedia page on the rhombic dodecahedron.
Want to see more? I made another version of this Ionic rhombic dodecahedron beaded bead that I blogged about in 2010.