You fashion the clay used as material component into an exact copy of an object you hold in your hand. The object must fit in a 2-inch cube and you must hold it in your hand during the casting. The copy is made of clay, though it is visually identical to the original. A person who succeeds on a wisdom (insight) check against your spell save dc figures out the copy is a fake. The copy also breaks if it takes any damage (ac 10, immunity to poison and psychic damage). Finally, the copy does not have any magical properties, even if the original does.