2007 Quarter Questions - Coin Community Forum

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Author	Replies: 5 / Views: 407
forme772 New Member United States 14 Posts	Posted 05/14/2025 1:34 pm How do I tell if the coins that I have are effects from heat, chemicals or any thing else. I have a penny that must have lost some chad because there is brighter copper showing. I will post them later. Is there a limit to the amount of times I post. The reverse side is brown Report this Post to the Staff

Spence Moderator United States 33113 Posts	Posted 05/14/2025 1:43 pm Quote: How do I tell if the coins that I have are effects from heat, chemicals or any thing else. Experience and comparing with coins that have a known history of these sorts of exposures. For example, the dark patina on this quarter might have been from heat, but normally we see bubbling between the layers, so my thought is that this is rather due to chemical/environmental exposure. Coins that have been buried in the ground for a while can look like this one. Spending time going through old threads in this subforum would help you to learn quickly what to look for. Quote: Is there a limit to the amount of times I post. No--there is no limit to the number of time you post. However, nuisance posts such as one work answers that don't progress the conversation are frowned upon and may generate a wrist slap. "If you climb a good tree, you get a push." -----Ghanaian proverb "The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz Report this Post to the Staff
Errers and Varietys Bedrock of the Community United States 59482 Posts	Posted 05/14/2025 2:17 pm Spence explained it pretty well. As for your coin, it's showing environmental damage. Errers and Varietys. Report this Post to the Staff
jbuck Moderator United States 164037 Posts	Posted 05/14/2025 2:18 pm Heat, moisture, or dirt, it is environmentally damaged. However, it is starting to gain a circulation cameo. It will not make you rich, but they are fun to have. Coin Collector Since 1978 My Avatar My Old Avatar My 7070 My Eisenhower Dollars CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
Sap Moderator Australia 16332 Posts	Posted 05/14/2025 8:32 pm Quote: How do I tell if the coins that I have are effects from heat, chemicals or any thing else. As a very general rule: Heat as from a fire or blowtorch will likely cause deformities - on clad coins, this is usually manifested as large lumps and bumps, when a large blister forms between the clad layers and swells up like a balloon. Depending on the source of heat, the formation of a thick black oxide layer on the coin's surface is the most likely colour change. Chemicals can do various things to coins, depending on the nature of the chemical and how it reacts with the coinage metal. This can include staining, corrosion, pitting, and (in the case of corrosive acids) a "shrinking" of the coin in terms of diameter, thickness, and weight. If I had to guess as to how this specific coin has turned black like this, my suspicion would be chemical. Leaving a quarter in chlorinated water such as a swimming pool or public fountain for a month or more is likely to make it turn black or dark grey. Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis Report this Post to the Staff
Dearborn Moderator United States 71828 Posts	Posted 05/14/2025 10:33 pm to CCF. Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 47/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
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