Answer:
You use a knife to slice my head. And weep beside me when I am 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.
I'm very tempting, so its said, I have a shiny coat of red, and my flesh is white beneath. I smell so sweet, taste good to eat, and help to guard your teeth.
What has two legs but doesn't walk?
What do you fill with empty hands?
You can always find me in the past. I am created in the present, but the future can not change me. What am I?