I made this using 3d heightmaps of a mjolnir image I found online. I printed it in glow-in-the-dark PLA and wear it on a steel chain.
The original STL was so detailed that my Slic3r just couldn't handle it. I had to decimate it 90% using blender and fix the holes this generated in netfabb. In the end though, I'm very pleased how it turned out!
decoratedmjolnirdecimatednoholes.stl | 594.9KB |