Answer:
It is able to speak because it has a hard gone. You know what it is as soon as it has sung. What is it?
Though blind as well, can lead the blind well.
What is bought by the yard by is worn by the foot?
Vikings use this for warmth.
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.
When is it bad luck to see a black cat?