All Franklin half dollars were made of 90% silver, but 1951 is not a rare year. In lower grades the coin's value is mostly determined by the value of the silver it contains, about 0.36 times the current price of an ounce of silver.
Look on the back of the coin to see if there's a small mint mark letter just above the Liberty Bell. It may be blank or there may be a D or S.
Numismedia lists the following approximate retail values as of 10/2011:
No mint mark (Philadelphia):
Almost no wear - $18.60
Uncirculated - $19.20 to $2340.00 depending on quality
"D" mint mark (Denver):
Almost no wear - $19.10
Uncirculated - $26.40 to $1200.00
"S" mint mark (San Francisco):
Almost no wear - $19.10
Uncirculated - $26.40 to $1920.00
DISCLAIMER: The retail values quoted are the best available as of the date shown, but may vary significantly due to changes in the precious metals market. Also the wholesale (buying) price of a coin will be less than the selling (retail) price. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
View the links below for full statistics and other values of the coin for different conditions.
50$
Value is for the silver about $2.50
The US didn't strike any half dollars in 1804.
Please check your bill again and post a new, separate question. No US bills are dated 1951.
No US bills were printed with a 1951 series date. Please check again and post a new question.
50$
A US half dollar with a date of 1979 is a Kennedy half dollar not a liberty half dollar. The coin has no silver and is only face value.
It has a metal value of about $10.
Value is for the silver about $2.50
About $4-5
50 cents.
a half dollar
The US didn't strike any half dollars in 1804.
Yes. It is composed of 90% silver and 10% copper.
In average circulated grades the value is less than one dollar.
A U.S. half dollar dated 1953 or 1952 is a Franklin half dollar. If it shows any wear, the value is only for the silver, about $10.00. The coins are very common.
A US half dollar with a date of 1983 is a Kennedy half dollar not a liberty half dollar.The coin has no silver and most are only face value.