The fourth man digs at the spot where he dropped the shell, expecting jewels, but discovering mere iron, from a Tuti-nama (Tales of a Parrot): Forty-seventh Night

Against a rocky landscape, a lone man raises a pickaxe. Previously, he and his four friends had received shells from a wise man, who claimed they would lead the men to their fortunes. Three of the friends discovered copper, silver, and gold. The fourth man, however, was dissatisfied with the discovery of iron, and his greed ultimately led to his downfall.