Not enough information. Please post a new question with any wording that you can make out on the coin, as well as its date.
One way to know a coin is not silver is to check it with a magnet. If the magnet sticks to the coin, it is not silver. If the magnet does not stick, it still might not be silver. You can test it, but to do that you need a test kit.
The USA 3 Cents coin, issued 1851 to 1889. Two versions of the silver 1869 coin > The 14mm size coin has a star on the other side. The 18mm size coin has a portrait on the other side.
The date is struck on the coin
If you have a Liberty Seated Dime, the "CC" mint mark will be on the reverse [tails] side of the coin at the bottom and can be either inside the wreath or just below it. If you have a Liberty Seated Quarter the "CC" mint mark will be on the reverse [tails] side of the coin at the bottom below the eagle. If you have a Liberty Seated Half Dollar the "CC" mint mark will be on the reverse [tails] side of the coin at the bottom below the eagle. If you have a Lbert Seated Silver Dollar the "CC" mint mark will be on the reverse [tails] side of the coin at the bottom below the eagle. If you have a Silver Trade Dollar the "CC" mint mark will be on the reverse [tails] side of the coin a the bottom just above the "D" in "DOLLAR" If you have a Morgan Silver Dollar the "CC" mint mark will be on the reverse [tails] side of the coin at the bottom below the wreath.
If you mean a American Silver Eagle 1 ounce bullion coin. The value is tied to the spot price of silver at the time of sale. As of 5-26-12 it's $28.53 per ounce. This price is a little less than you could buy it for and a little more than you could sell it for. But it gives you an idea of value. Collectors versions of this coin do have higher values.NOTE: The spot price of silver and other precious metals changes by the minute when the market is open. So the value of this coin will go up and down.
what is a silver 1998 silver coin witha 5 and roses on one side and a doubleheaded eagle on the other worth
The American Silver Eagle is a coin worth one dollar. It is an official bullion coin, meaning it is stored for its value and not traded in regular commerce. The coin is 99.9% silver, with an image of Walking Liberty on one face and the titular eagle on the other.
Because the coin is not a silver eagle, with a date 1902 the coin is a MORGAN dollar. The first Silver Eagle was made in 1986.
It's a 2000 one-ounce Silver Eagle bullion coin and as of today is about $18.00
A 2007-W Silver Eagle is one Troy ounce of pure silver.
A 1 pound Silver Eagle is worth about $200.
The value of an uncirculated 1999 Silver American Eagle Littleton coin fluctuates based on the market for silver. However, a coin can be expected to have a value of about $40.
Silver Eagle coins were first minted in 1986 and are still in production today.
As of today the value is about $17.00 it's a bullion coin and the value is just for the silver. FYI it's called a Silver Eagle or American Silver Eagle coin
Silver currently sells for about $20/oz
See related answers.
The modern Silver Eagle bullion coin weighs 1 ounce.