Numismatic and History Discussion Forums > Coin Photography, Conservation and Storage

rough surface on denarii

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David Atherton:
I've had this coin for a while and was wondering what causes this type of rough surface....preservation,  harsh cleaning or something else?

David Atherton:
Here's the coin:

David Atherton:
Any guesses??  :-\

Joe Sermarini:
Probably removal of thick black oxidized silver by cleaning with acid, but that is a guess. 

David Atherton:

--- Quote from: Joe Sermarini on November 14, 2005, 03:58:54 pm ---Probably removal of thick black oxidized silver by cleaning with acid, but that is a guess.

--- End quote ---

Yea, I was afraid of that...

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