If they're genuine U.S. quarters, then yes, they're legal tender at face value.
The Gold and Silver Highlighted Statehood Quarters Collection is currently asking between $300 and $700 on eBay. If you are willing to pay that price, you could replace a set.
The US Mint has never made any gold quarters, it's a novelty coin that's been plated and has no collectible value.
The Mint does not strike gold quarters it's likely been plated and is only worth more than face value to someone who wants it.
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 US has never minted gold quarters. A private company took genuine proof quarters and plated them with a thin layer of gold. Unfortunately that means they're altered coins and have lost any numismatic value they had as proofs.
Well, there were no gold quarters minted, but there are gold colored dollars that are very close to the same size. If you have one it may have been plated by someone like the Franklin Mint. As soon as the statehood quarters were issued, telemarketers started gold-plating them and selling them as something special. 3 cents worth of gold + a 25 cent coin = $3.95 or more. Someone tried to sell their "valueable collectible" and found out it is really only worth face value, so they spent it.
The U.S. has never made gold quarters. It likely has been gold plated or just toned a gold color. Either way, it has no collectible value.
Bicentennial Dollars, Half Dollars and Quarters are very common and are novelty coins that have been gold plated. They are not a product of the US mint. And have little or no collectible value.
Gold-plated but not gold. It's an ordinary nickel that someone plated for use in jewelry or as a novelty piece. The US never minted nickels (or dimes or quarters for that matter) out of gold - it's worth far too much to use in small-denomination coins.
It is only gold plated which adds no extra value. Since it is a gold plated coin it is considered altered and is worth face value.
If you have a gold plated 1928 penny, chances are it was gold plated not very long ago. During the current popular trend in coin collecting, individuals are trying different gimmicks to add value to old coins, like gold plating them. You can find gold plated examples of the quarters for the 50 states. To a purist, gold plating actually takes away from the value of the coin. Collectors like to see coins that are in mint condition, like they just came from the mint, looking brand new, untouched and unchanged.