Value depends on what kind of error. please be more specific
The US never made gold quarters. What you have is a regular cupronickel quarter that was plated for one of those "special collectibles" sets sold on TV and in the backs of popular magazines. The coins underneath are worth exactly a quarter, the gold plating is worth only a few cents, the package is a couple of bucks.
The Mint has never made gold quarters. If you have a gold quarter then it has been plated which destroys the numismatic value of the coin. Its value is 25 cents plus the value of the little bit of gold they used to plate it. Some chemicals can cause the quarter to turn different colors. This also does not enhance the value of the coin.
The simple answer is that any US quarter dated 1964 or earlier is worth many times its face value because these coins were made of 90% silver. However if a quarter is older than roughly the late 1930s / early 1940s its collector value may be higher than its silver value but that depends on the coin's specific date, condition, and mint mark. For that you have to look at a values guide such as the Red Book, PCGS.com, Numismedia.com, etc.
It's worth exactly 25 cents.
It's worth 25 cents.
This is a very common coin. it is only worth face value.
It's worth exactly 25 cents.
If it is uncirculated it will be worth more than face value but if it is circulated it will be worth 25 cents.
The coin is a 2001 Vermont State Quarter, it's 25 cents.
If you got it in pocket change it is worth face value. If it is uncirculated it is worth a bit more than face value.
Only face value unless in mint packaging.
A 1942 Washington quarter is common. If it has any wear, the value is just for the silver, about $3.50.
In circulated condition, it has no added value. A nice uncirculated one is worth a dollar or two.
The coin can reach that value but it has to be in uncirculated condition.
If you mean the value of a US 90% silver quarter? Minimum value, as of 6-4-11, is about $6.56.The collectible value depends on date, grade and mintmark if any.
Bermuda's currency is linked to the US dollar. The coins are the same size and value as US coins and exchange one-for-one, so a Bermudan quarter is worth the same as a US quarter.