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 Replies: 38 / Views: 6,205 |
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Valued Member
 United States
330 Posts |
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Valued Member
United States
330 Posts |
 Silver florin that was at the end of a tape roll. These are not an everyday sight but not that hard to get a hold of. |
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Pillar of the Community
United States
8715 Posts |
Thought I would bump this thread with this coin I found in an aquarium.  I have a planted aquarium, and while I was doing maintenance on it I found this Washington quarter with some environmental damage on the aquarium substrate. How it got there I don't know. It has an interesting copper color.   |
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Bedrock of the Community
Canada
24885 Posts |
1911 Australia One half penny (acid dip)   |
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Moderator
 United States
188770 Posts |
Quote:Thought I would bump this thread with this coin I found in an aquarium. I have a planted aquarium, and while I was doing maintenance on it I found this Washington quarter with some environmental damage on the aquarium substrate. How it got there I don't know. It has an interesting copper color. Very interesting!  Quote:
1911 Australia One half penny (acid dip) Oh my! |
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Pillar of the Community
United States
2627 Posts |
Quote:
How about sea water corrosion on shipwreck coins? This 1782MO FF Mexico 8R from the El Cazador shipwreck shows the effects of the saltwater, especially on the reverse. Unfortunately I only have these old pictures.   |
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Pillar of the Community
 United States
6514 Posts |
Quote:while I was doing maintenance on it I found this Washington quarter with some environmental damage on the aquarium substrate. Someone must have made a wish. |
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Valued Member
United States
330 Posts |
  Anybody seen a coin tone like this before? If so, I'd really like to know how this happens. I've pulled a few silver half dollars with this exact type of toning -- dull, heavy black obverse and thin, metallic reverse before, but this one is a clad dime. My best guess is that this was at the end of a roll with the obverse exposed. |
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Valued Member
United States
330 Posts |
You've all doubtlessly seen clad coins with blackened surfaces. Someone I asked suggested they've been burnt, it's one of those things I've always thought was reasonable but wished for corroboration on. I just found that corroboration. (The Spokane Fire is likely the one that happened in 1889.)   |
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Pillar of the Community
Belgium
1185 Posts |
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How about sea water corrosion on shipwreck coins? this extremely rare half Ducaton from the Spanish Netherlands (Antwerp, Charles II 1684 - Delm.337 - R3) was recovered in 1981 from the VOC ship 't Vliegend Hert built in 1729 and shipwrecked in 1735 near the coast of Vlissingen, Zeeland 250 years of sea water was not kind to the coin, but still it is a great rare piece  |
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Valued Member
United States
330 Posts |
Shipwrecked coins are one of those things I've always wanted, but never gets high enough on the priorities list to actually buy. I visited the shop yesterday, and actually got some good news: the both of these are naturally toned. They've been toned by the sulfite that's in those tan paper coin envelopes. The silver round has a solid blue surface on the reverse, and the bronze has a real rainbow appearance to it. I had to tilt the coins to have a better image of how they look.   |
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Pillar of the Community
Belgium
1185 Posts |
nautilator, the sulfur indeed reacts strongly with the silver; placing a silver untoned coin close to a boiled egg causes this too Quote:
Shipwrecked coins are one of those things I've always wanted the interesting aspect of coins from official rescue of a shipwreck - like coins from officially documented hoard finds - is that it connects the coin to the original period when it circulated this is becoming more relevant in a period plagued by modern numismatic frauds (that become better every year) from China
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Moderator
United States
188770 Posts |
Quote:
I visited the shop yesterday, and actually got some good news: the both of these are naturally toned. They've been toned by the sulfite that's in those tan paper coin envelopes. The silver round has a solid blue surface on the reverse, and the bronze has a real rainbow appearance to it. I had to tilt the coins to have a better image of how they look. Well done with the photos. The coins look great! |
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Valued Member
United States
330 Posts |
This is what happens if you put your immaculate coins on a foam background to prevent movement/damage. A few decades and the foam breaks down and leaves a much worse looking pvc-style surface on whatever metal it is.   |
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Moderator
United States
188770 Posts |
Oh my! |
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Posted 06/16/2018 2:48 pm
