Fool's Gold (3.5e Spell)

It looks like you've got Midas's touch.

This alters the tactile, visual, and taste attributes of some mundane objects with a total volume no greater than 1 cubic foot per level to make them seem like gold. Any creature who touches any of the objects gets a Will save to disbelieve this illusion.

This does not change the weight of the objects, so it's a good idea to use a heavy material such as lead if you plan on having your victims handle your fake gold before you run away.