Answer:
A box without hinges, lock or key, yet golden treasure lies within.
Tool of thief, toy of queen. Always used to be unseen. Sign of joy, sign of sorrow. Giving all likeness borrowed.
They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own.
I bind it and it walks. I loose it and it stops.
Each of these ends in a kettle full of precious metal and the double variety is quite awesome
Born in the ocean and white as snow. When I fall back to water I disappear without a trace.