Although it would be interesting to see an enameled version of this pendant, I can hardly complain. This is the sort of thing a Portal fan will immediately recognise, without attracting derisive cries of "Geek!" To those not in the loop about Portal, it looks mysterious but appealing.
I'm unsure about what metal was used to make this, but the finish provides an appropriate high-tech look. And if the cord pictured is anywhere near the normal thickness for pendants, this piece has been *very* precisely machined, and holds a level of detail I wouldn't expect on this scale. Now if only it could play "Exile Villify", too.