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 Replies: 17 / Views: 3,513 |
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New Member
Croatia (Locally: Hrvatska)
18 Posts |
Can distilled water or olive oil harm gold coin on any way?
One of my gold coins have some dirt, mud on it, and I would love to get rid of it before taking pictures and posting it here. Otherwise, aureus is in condition like it was 1750 years ago.
And other question, is it normal for gold coin to darkens, why is that happening and how to prevent that?
And how to clean darkening on gold coins?
For example, you can look at my Diocletian, and darkening areas on it, especialy on edges and where are words.
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Pillar of the Community
United Kingdom
2100 Posts |
Gold doesn't react to any of those. I am not sure what can cause darkening on gold.
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Pillar of the Community
United States
2044 Posts |
I've never owned a gold coin so I can't say from experience. I have read a few things online about cleaning gold coins. Doesn't mean it's the correct way because I don't know. Quote:
Being of a "noble metal" that doesn't itself react chemically with its environment, gold coins are not likely to discolor during cleaning although a centuries-old tone could be removed. Wash carefully in clean, warm, soapy, distilled water with a fluffy cotton washcloth or very soft toothbrush. Because gold is softer than silver, be careful even when using a soft toothbrush for cleaning, as any grit present it will make minute scratches on the surface. Quote:
Not even the most aggressive acids in the earth can do much damage to gold coins and a quick rinse in soap and water is often enough to clean gold coins. But if the coin really does need a clean, place it for a short while in citric acid (lemon acid). |
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New Member
 Croatia (Locally: Hrvatska)
18 Posts |
I don't know is this just a illusion, but it seems to me that gold coins preserved in mud for centuries doesn't seems to change at all their gold appearance, but once unleashed from mud, and on air, they do get some darkening, some of them just slightly and some of them a lot. It's not 24 carat gold, it's 22 carat so there is probably alloys what make gold coin darken after exposed to the air and oxigen. That is only my amateur opinion, but from experiance. Could also be that at first sight, coin looks brighter to me than it realy is, and more I'm looking at it, more dark details I see. Don't know.
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Pillar of the Community
United States
2044 Posts |
Let's see a photo of that coin.
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Pillar of the Community
United States
3229 Posts |
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Valued Member
Canada
472 Posts |
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Moderator
 United States
23731 Posts |
The only thing that I would do to attemt to remove any dirt is to wash it in your hand with warm water and some mild dish soap and than pat dry with a soft cloth. This is a very interesting coin that no one has been able to come up with a reference for. It's either an unlisted rare example or an extremely well made fake.
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Pillar of the Community
United Kingdom
2100 Posts |
I have been ploughing through Bastien (and suppements) as I believe the mint of origin be Lugdunum. The only gold coins in Bastien are aurei and they are typically 18-20mm with weight ranges from 4.30 gms to 4.86 gms. Denarii and quinarii are issued in bronze. This coin certainly looks gold but exactly what it is puzzles me.
Martin
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New Member
Croatia (Locally: Hrvatska)
18 Posts |
That is Diocletian Aureus Quinarius, it's almost unique coin, because since Diocletian monetary reform, half aureus have been disappeared. And it is 100% genuine. As well as this other, that need dirt cleaning. Also rare coin, and well preserved to. Claudius Gothicus Aureus, 5.4 g   Edited by Caesar
11/02/2012 5:26 pm
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Valued Member
Canada
472 Posts |
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New Member
Croatia (Locally: Hrvatska)
18 Posts |
Dionysos, yes I know. That one, is also best match that I could find, but from NAC they told me that this is not unique. Guess that they know for some other such exact coin from their customer which is not listed, but they have it in their private lists.
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Valued Member
Canada
472 Posts |
Hmmmm, intriguing  You say that NAC told you that there were others, you mean like yours or the other that they sold (bust right) wich is already accounted for in several publications ? I'm thinking of buying a house in Croatia, any suggestions  |
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New Member
Croatia (Locally: Hrvatska)
18 Posts |
I didn't ask details, they just told me that it is not unique.
Well, for buying a house in Croatia you must first be a lawyer, otherwise you could easily go to jail. In Croatia, we all are lawyers, and still, there are big waiting lists for jail-house. :)
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Bedrock of the Community
United States
10045 Posts |
Could there be some residual copper in the alloy the coin was struck from--that has since toned? Is that possible on Roman gold aureii?  to our group Caesar! |
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Pillar of the Community
United States
4253 Posts |
Quote:
I'm thinking of buying a house in Croatia, any suggestions Kinda stealing the thread, but I would suggest Pula. Wonderful place, but I do not know the laws regarding foreigners buying in Croatia. |
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Replies: 17 / Views: 3,513 |
Posted 11/02/2012 3:11 pm
