Answer:
What has thirteen hearts But no body or soul?
A precious fluid, thicker than water.
What word starts with 'E', ends with 'E', but only has one letter? It is not the letter 'E'.
Sometimes black, sometimes white, I have veins but no blood
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.
What is always coming but never arrives?