Riddle #348

Question: Had by few but treasured by all,
I'm on the inside and outside and I make men fall.

What am I?

Question: What tastes better than it smells?

Question: What goes in the water black and comes out red?

Question: What asks but never answers?

Question: Resurrected, they descend by the millions. Sometimes, to nourish and give life. Other times, to take lives or destroy. They have been known to fill entire valleys and block roads only to disappear before executing their long journey back to the top. What are they?

Question: I have 6 faces and 21 eyes, but can't see a thing. What am I?