@DerpasaurusWrex @MishGEA 2.5% copper. It's probably not worth it to separate (it already costs more than 1c to manufacture a penny).
The other coins contain much more copper, even though they don't look like it. Again, not clear separation costs would make this worthwhile as a "copper stockpile".
@MishGEA 2.5%铜的DerpasaurusWrex。分开可能不值得（一分钱的制造成本已经超过1c）。
其他的硬币含有更多的铜，尽管它们看起来不像。同样，不明确的分离成本将使其成为一个“铜储备”而有价值。