Oh no!
Upon being dug up, an odd, rusty object layed. Just sitting there. Still.
Suddenly, upon being polished, this happened!
~Exodasius

(I know it doesn't look all steam punky, but attempt to visualize its skin as something like this:
The blue is basically an unknown power transmitter (The only thing I made non steam punkish).
The green is the same material as the heavy density pipes underground, although a slight different shade. The gold is... well... gold.