Difficult

Neither bought nor sold but more valuable than gold. It is built but not by hand. What is it?

related riddles

Iron roof, glass walls, burns and burns and never falls.

Many have heard it, but nobody has ever seen it. It will not speak until spoken to. What is it?

If you throw a bottle of wine, a carton of juice and a can of soda at someone’s head, which one will hurt the least?