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 Replies: 12 / Views: 1,284 |
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Valued Member
United States
168 Posts |
Did I find another gutter coin or is this an improper mix? Cheers!   |
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Bedrock of the Community
United States
94367 Posts |
Guessing this is just environmental discoloration or staining.
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Bedrock of the Community
United States
19136 Posts |
Quarters of this era are clad, so an alloy mix issue is highly improbable. I'm seeing evidence of dried crud/film, which may have been the result of spending some time in a poorly maintained fountain or pond....or even damp soil. Might be fun to try an acetone soak to see if the crud can be reduced or eliminated.
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Pillar of the Community
 United States
7174 Posts |
 something in its environment. |
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Valued Member
 United States
168 Posts |
Okay, cool. I will give it a thorough acetone bath! TY
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Bedrock of the Community
United States
73903 Posts |
It's been stained from environmental damage. PMD. Could have had liquid spilled from a drink on it. Errers and Varietys.
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Moderator
United States
188001 Posts |
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Moderator
United States
95403 Posts |
Lets see it after that acetone bath if you please..
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Moderator
United States
54280 Posts |
Did you notice the fingerprint?
Show your financial support of the Coin Community Family (click here)See my topic on Mexican Numismatic Medals (click here) |
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Valued Member
United States
168 Posts |
I will update after the acetone bath. Yeah, I ran the fingerprint through the database but no matches. #128523;
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Pillar of the Community
United States
1648 Posts |
Improper alloy mix errors are found on older coins and Lincoln cents prior to 1983 with streaks or lines of varying widths and lengths. This general term 'improper alloy mix' can refer to incorrect proportions of an alloy's constituent metals, incomplete mixing of those metals, or a combination of both. When the metals are not thoroughly mixed, you can end up with streaks in the coin metal strip. A woodie is an improper alloy mix for example that has a poorly mixed alloy that can result in alternating light and dark streaks. This is often referred to as a "wood grain" pattern. What you have is just some environmental damage. https://www.coinworld.com/news/us-c...erstood.htmlhttps://www.error-ref.com/improper-alloy-mix/ |
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Pillar of the Community
United States
1757 Posts |
The 2021 quarter is made of cupro-nickel, which is a mixture of 8.33% nickel and the rest copper. The coin weighs 5.670 grams and has a diameter of 0.955 inches.
Its copper sulfide and copper chloride which acetone or even an ultrasonic bath will do little. John Lorenzo Numismatist
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Valued Member
United States
168 Posts |
  As promised, updated post acetone bath. |
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Replies: 12 / Views: 1,284 |
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Posted 11/21/2024 2:36 pm
