Here is a Necklace design of Mjölnir, or the Thor's Hammer from the Nordic mythology I did few years ago, for Nordicplan Studios. It was an awesome project and I had lots of fun recreating the relic in 3D. It was hand sculpted in Zbrush, textured in Substance Painter and rendered also in SP in IRay. The prop was planned to be used in a short film, but I am not sure if it was in the end.