A 1972 US cent would be made of solid bronze and have a different color than a new one, but not goldish. If it sticks to a magnet, it is either not real or has been coated with some metal with magnetic properties.
A normal 1979 penny will not stick to a magnet -- it's made almost entirely of copper -- a non-magnetic material. So for your coin to stick to a magnet, it has to either be fake, or plated with some kind of magnetic material. In either case, it's value would only be as a novelty item -- perhaps a couple dollars at best.
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When two pieces of cui or other unclassified information are posted online together?
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