Interesting similiarities Dan, but i'm fairly sure that we will find no actual connection between this amulet and Thor's hammer.
I also think that it is possible that an amulet like this might not originate in the same culture that the mandau is from. Isn't it possible that pieces like this might be acquired through trade or taken off a dead enemy? It looks somewhat like T'boli design and craft to me, but i do admit that my knowledge of that culture is limited.
