The Crown
A king has a large
supply of gold and wants his local jeweler to fashion a crown.
The jeweler is known for his necklaces and rings, but his work with
fine metals in unparalleled. The jeweler fashions a beautiful
crown, but the king is suspicious that the jeweler may have mixed base
metals with the gold, cheating him out of some of the precious
metal. Without destroying the crown, how can the king tell if the
jeweler only used the gold given to him?