Plated As of Augustus, magnetic

[quisquam]

Hi,

this is an copper-plated coin. It's magnetic, so the core seems to contain iron.

I have read about badly corroded, unattributable roman subferrati found in austria, but I wasn’t able to find more information at all about fourrees with iron-core in the internet.

Plated denarii are relatively common, but I would love to see more examples of plated bronze-coins, if there are any, and to get more information about them.

Stefan

[moonmoth]

By magnetic, do you mean that it attracts other iron objects, or it is attracted to a magnet?

If it is attracted to a magnet, it is likely just to mean that there is some iron in its mix.  I have many coins like that, mostly quite ordinary late Roman bronzes.

[quisquam]

The Coin is attracted  by a magnet, similarly heavy as modern, iron-cored copper-coins, so there must be a lot of iron in it.

This coin is from a batch of badly corroded ancient metal-discs I bought to experiment with. This one had extremely hard crusts, which couldn't be removed even with a steel-scalpell. After filing the edge a little I saw a dark core, covered with a foil of copper. Interestingly the crust looked exactly the same as the core! It must be mineralized iron (haematite I think), as it could be removed with acidic lemon-juice. Please don't blame me for the brutal treatment of this coin, I didn't expect to find something interesting.

I have attached a pictute, that shows core and crust. It definitely is a fourree.

Stefan

[moonmoth]

Yes, very interesting.  And if it's that strongly attracted, I agree with you about the core.  I have  as an example, a follis with holes bored in it that show it doesn't have a diffferent core, that will jump to a strong magnet.  But it comes away quite easily, whereas a modern 2p piece will not.