In the film Indiana Jones and the Last Crusade, Indiana chooses the Grail from a selection of cups. He chooses the one that's not made of gold, saying “that's the cup of a carpenter”. But what material is it made of, if not gold?
A previous answer claims it's a clay cup. But I had assumed the cup would be made of wood, because a carpenter works with wood. What else would Indiana mean with that statement?
Which one is right?