A $25 gold piece is called a Gold American Eagle. These were first minted in 1986 and have been minted each year since then. The values for these coins range from $480 to $600 depending upon the year of mintage and actual condition of the coin.
.24187oz
These coins weighed 33.1 grams when new, and are 90% gold.
The actual gold weight is .24187oz of pure gold.
About $325, for its gold content.
The 1875 Double Eagle is made from 90% gold & 10% copper.
a 1900 five dollar bill will be worth a video game.
This is a 1/10th ounce gold bullion coin.
probably now millions of dollars it depends if the gold piece was famous
Please see the attached link.
$1370 to $15000 depending upon the condition of the coin.
Please post a new question and include the date and condition of the coin.
It is worth about $160-170 in an internet auction.