1984 Need Some Help To Identify This Error

The arc-like feature near the obverse rim is a sign of die deterioration--the feature is known as a Ridge Ring. The feature above LIBERTY could be an abrasion received in circulation--assuming the feature is sunken (incuse).

This is not an error. It is a die wear issue. "Errors" are not a general term. There are die events, coin events and hub events. These deal with die aging, die break down, Feeder Finger Damage and other issues of hubs and dies. Striking issues are a different type of issues with the striking processes. Then there is Die variety Issues like the post 1908 dies that were created with full design features, but adding the mintmarks to the die, then 1990 forward, the dies had all of the devices put in place with the Master hub, Master Die, Working hub and working die creation with every done in a single step. Errors are more of a term that are one off events. Wrong planchet, die striking issues that were not the same die pair combination. Incorrect blanks/planchets) These are one of a kind most of the time events. Then there are damaged coin issues, which are not a mint error at all. To lump all these things into an "errors term" is not correct assumption. We don't lump a meals into a 'Food' category. We link them by names of the meals/types/even countries. So when asking questions, the direction is not an error coin if it is one of the categories I mentioned. Even junk coins, are not errors. They are damaged coins. So knowing what is what will help you learn what is collectable and what is common. Most coins posted here are often, not an error coin, not a coin variety, but often die events, striking events, coin damage, die damage. The more you know, the more that continues to be learned even more. So take time to learn. See what the issue is on coins you find. Then identify what it is and see if there is any premium for that. Thinking you have found the Holy Grail, is a big disappointment, when we have to tell you what you really have. Just because a coin looks different, doesn't always make it something you can retire on. Things to do when you find a coin:
1. Post asking about what you coin has. (Don't assume first and then take the fall when it is not that)
2. When you find out it is Machine Doubling, learn more about what the means. (Check the CoopHome information)
3. When you find out that, you coin is Machine Doubling loop at the sites to see what you thought it might be. See the listings for DDO / DDR/RPMs. Study that year/mint and other years around that design to see what the hub doubling/what the RPMs could look like. Then you will have a better idea what to look for on the coins you are searching through.
4. If you are a roll searcher, (All the same date/mint in the rolls) learn what the doubled dies look like first, before searching through them. Then you will know what to look of that design. When you know what to look for, them after not spotting the variety, move on to the next coin. Why? Looking to long at the coins will lead you to find Machine Doubling and damaged coins and extreme die wear coins. A varieties will show enlargement of the devices. Machine Doubling reduces the sizes of the devices. Always look at the centers of the devices, not on the outside edges of the devices. (waste of time to look there)
5. Post 1999 quarters are pretty much all the single squeeze devices on the dies. So the doubled dies on these will not be in the same areas as the older style devices creation. (multi hub process of die creation)
6. Look to see what years don't have doubled dies. IE: Dimes: Look at the listings on Variety Vista to see what to look for and what years do not have any DDO / DDRs on them. But knowing what to look for will help you spot varieties a lot faster.
7. Any coin damage/spotted/totally undesirable toss back into circulation. They are just face value coins and not worth taking another look at them. (I always ask myself, "Would I buy this coin is there was a variety on it?") If not, toss it back into circulation.
8. Never assume. Best to ask for help with a question, rather than assume. Start your own thread with a question. Best to get an answer and have that to add to you coin collecting knowledge.
9. The members here are always willing to help new ones learn. I find if I can show what I see on your coin, and then you see it also, then I've accomplished my purpose. (Looking forward to your questions)

CoopHome: There is so much to learn, where do I begin? start with a question. You might be surprised at the answer you get.