Hi, I found a penny that is as thick as a nickle, does anyone else have one. It weights the same as other penny's. Would it be considered an error? I also post a pic of my other errors. &
That "thick" one is a proof. The squared off edges of a modern proof will usually look like that. The mirror surfaces are also an indicator. It is not an error but a specially made coin, struck on a polished blank under increased pressure. The proof cent (made to be issued in proof sets, for sale to collectors) is really no thicker than a regular business-strike cent (made for circulation), except perhaps a little bit at the edges, as you can see. The squared-off edges do make them appear to be a little bit thicker. Again, this is because a proof coin is struck with increased die pressure, and often struck multiple times for a stronger impression than a regular issue coin would have. Your proof cent was once a part of a proof set that was broken open at some time, and dispersed from the other coins in the set.
BTW, you shouldn't hold coins - especially proofs- the way you did in these photos. Proof coins have more delicate surfaces. Skin oils are bad for "red" uncirculated copper as well.
