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Goldish Patina : Do You Have An Explanation?

 
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Author Previous TopicReplies: 5 / Views: 260Next Topic  
Valued Member
France
232 Posts
 Posted 11/23/2020  09:07 am Show Profile   Check ancient67's eBay Listings Bookmark this topic Add ancient67 to your friends list Get a Link to this Message
Hi all,

I recently acquired this distater from Thourioi (the new Sybaris) struck in late classic age (350-300 BC) and one of the reasons, beside its splendid classic style, was its extraordinary goldish patina. It is now 5 or 6 years that I look at all the greek coins in the main Auction Houses, and it is excessively rare to find such a patina. Actually, the only other exemplar I can remember is precisely from the same type (see below)...

Does anyone have an explanation for this strange phenomenon?

One of the things I like the more with numismatics is that every specimen carries with it its own fate, its own history, that it is a contingent encounter between art, as intentional, and accident. As wrote the Greek poet Agathon (quoted by Aristotle) : "Art loves hazard, and hazard loves art".


Valued Member
United States
365 Posts
 Posted 11/23/2020  10:33 am  Show Profile   Check John K's eBay Listings Bookmark this reply Add John K to your friends list Get a Link to this Reply
mighty purrrty! But I have no clue how that happened.
Valued Member
United States
412 Posts
 Posted 11/23/2020  10:52 am  Show Profile   Bookmark this reply Add NumisEd to your friends list Get a Link to this Reply
What is this coin made of?
Valued Member
France
232 Posts
 Posted 11/23/2020  11:14 am  Show Profile   Check ancient67's eBay Listings Bookmark this reply Add ancient67 to your friends list Get a Link to this Reply
It is silver
Pillar of the Community
United States
1133 Posts
 Posted 11/23/2020  11:47 am  Show Profile   Bookmark this reply Add Kushanshah to your friends list Get a Link to this Reply
I suspect they come from the same hoard, were cleaned by the same process and then stored under the same or similar conditions. Chemical cleaning leaves reactive surfaces. Sulfur pollution in the air can produce yellow to brown to black toning over time. Likewise, materials used to construct coin cabinets impart various 'cabinet tones'. Toning tends to be more pronounced (sometimes iridescent) in protected areas which retain some degree of original mint luster, which appears to be the case here. Trace elements in the silver alloy may also be a factor. Lovely coins!
Edited by Kushanshah
11/23/2020 11:47 am
Pillar of the Community
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United Kingdom
544 Posts
 Posted 11/23/2020  10:11 pm  Show Profile   Bookmark this reply Add Novicius to your friends list Get a Link to this Reply
They look very attractive with the golden patina. Beautiful coins.
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