“The penny was always made of copper.”

Many people might assume that the familiar one-cent coin, commonly called a "penny," has always been made of solid copper. This misconception likely stems from the coin's distinctive reddish-brown color, which strongly suggests copper, and the fact that for a significant portion of its history, the penny indeed contained a high percentage of the metal. For generations, the weight and appearance of the penny reinforced this idea, making it a widely accepted, though incorrect, belief.

However, the truth is that the penny's composition has undergone several significant transformations since its inception (Review). While the earliest U.S. pennies, minted from 1793 to 1837, were almost entirely copper, this material was not a constant. A notable change occurred in 1943 during World War II, when copper was a critical war material. To conserve copper for ammunition and other military uses, pennies that year were temporarily struck from zinc-coated steel. This created a silver-colored coin, much to the surprise of the public at the time.

The most enduring change to the penny's make-up came much later. Since 1982, the vast majority of pennies produced have been composed primarily of zinc, with only a thin outer layer of copper plating. This shift was largely due to the rising cost of copper, making it economically unfeasible to produce a coin worth one cent using mostly copper. Thus, while the penny still maintains its traditional copper appearance, its core material is fundamentally different from its predecessors, busting the myth of its unchanging copper composition.