Amulet is a tricky and interesting variation on the standard six piece burr. To quote Allard's blog post about it: "He’s fiddled around with a standard six-piece burr and added a few constraining voxels around the middle and shorted one of the axes… adding those voxels makes all the difference it turns out – without them there’d be 144 solutions, with them the solution is unique… and quite tricky!"
Construction of this puzzle is excellent, with a nice fit that will tolerate a fair amount of movement.
47 copies made for sale, each signed and dated. This puzzle is shipped assembled.