In fire gold and silver are tested, and worthy people in the crucible of humiliation Did you know that the ancient method of refining precious metals is still practiced today?   Craftsmen still subject gold or silver to intense heat in a metal container called a crucible until it melts.   Then the hot, molten metal is carefully stirred, and the impurities that rise to the top are skimmed off.   The process was, and still is, dangerous, time...