I'm not a coin collector by any means. I'm a detectorist that hunts beaches mostly, and I tend to find alot of interesting things which includes coins. Yesterday I was out hunting and found this odd coin that was not like the rest. Usually I find alot of clad quarters, and you can tell it's clad by just looking on the edges. If it's clad and been in the ocean long enough, the copper starts to leech through as it oxidizes leaving behind green residue while also exposing the pinkish copper core. If you can't tell, sometimes a good scratch your your finger nail can expose the copper core better. The coin I found was not like that at all, but rather the edges were black sandwiched between what I presume is nickel clad. I gave it a good scratch with my finger nail and it didn't do anything to the metal within. Checking the date shows that it was from 1967, and I know that they stopped making silver coins after 1964. I'm just wondering what your opinion is on this coin, could it be an error coin or just really tarnished copper that didn't leech? Below are three coins from around the same era from top to bottom: 1966 quarter. 1967 quarter, T he strange 1967 quarter
Definitely a environmentally damaged clad quarter. I find them in all different colors and levels of deterioration. All three of the quarters show an outside clad layering IMO.
All clad coins and Nickels starting from 1965 are compromised Cupro-Nickel. I have metal detected thousands of environmental exposure toned clad and nickels over the past 14 years. Here are many of my detected examples..
That's the thing though, It's been exposed to the ocean which should have exposed the inner copper core in the rim. This coin is different because there doesn't seem to be a inner copper core, I also scratched it on a surface to do a silver acid test. It's not silver but it ain't copper either cause the scratched edge does not shine through at red/pink as copper would if it had a copper core. Also notice how your copper core nickel clad quarters are green, that's also how you can tell it has a copper core. But mine is only red like it's just nickel which is very odd.
That depends on how long it was in the saltwater. Also, a harsher acidic environment is what affects the core quicker.
Let's remind folks that clad coins are 75% copper/25% nickel bonded to a 100% copper core. Nickels are not clad but are entirely made from the same 75% copper/25% nickel alloy as the outer layers of the clad coins. The two different types weather differently in different environments.
