Answer:
You must keep this thing. Its loss will affect your brothers. For once yours is lost, it will soon be lost by others.
By the way, what never moves, wears shoes, sandals and boots, but has no feet?
If you break me, I do not stop working. If you touch me, I may be snared. If you lose me, nothing will matter.
People are hired to get rid of me. I'm often hiding under your bed. In time I'll always return you see. Bite me and you're surely dead.
The ones who see it may go blind, Contracting the fool's madness. You have to dig to find it, Crush big stones or mine it. Wash dirt clumps in a pan and wait for it to settle, A shiny, precious metal.
Dark, feathery, and popular in Baltimore and fantasy books.