A closer look

The imperial Spanish thirst for shiny rocks led to the greatest nautical face-palm in history. Conquistadors mining in South America kept finding platinum, a metal that melted at too high a temperature to easily forge. Believing it was just "platina" (little silver) that hadn't ripened properly in the earth, they angrily chucked it into rivers so it wouldn't ruin their actual silver haul. Today, that discarded "trash" is worth infinitely more than their precious silver.