Easy ways to tell if it is copper or zinc... If you see plating issue it is zinc, the copper coins tend to tone differently than the zinc coins, drop one of each on a hard table top(copper will make a high pitch ring sound, while the zinc will hit witha low thud), put one copper coin on your right fingertips with palm up and a zinc one on your left fingertips palm up move your hands up and down slowly concentrate on the feel of each(the copper one will actually feel slightly heavier with practice), and if all else fails BUY A SCALE(they are not that expensive)