The silver content is valued at the spot price, which is about $10 right now. However, coins such as this usually demand a premium over spot. So if you were to buy on eBay or some similar site it might cost anywhere from $13-$18.
From your description the coin is a Americain Silver Eagle that is made from one ounce of 99.9% pure silver, value as of today is about $19.00
Silver sells for around $14/oz
What is the value of a Silver Platter / WM Rogers 291 With Eagle Star Perfect condition.
yes
A date and if possible a mintmark is needed.
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that is a Silver Eagle, the us government sells them as 1OZ silver bullion. it is almost 100% silver. value depends on condition and date, right now silver is about $25.50 per ounce. so that coin is a MINIMUM of $25 at melt value. a 1996 silver eagle in BU (brilliant un-circulated) condition can go for $50+ while a 2003 eagle can co for $26
That's a one ounce silver round, so the value varies with the price of silver. As of 20 June 2012, silver is $27.90/ounce.
Silver currently sells for about $14/oz.
The bill that most closely fits that description is an 1899 US 1 dollar "black eagle" bill. Please see the question "What is the value of an 1899 US 1 dollar silver certificate?" for more information.
Eisenhower is on the front of the coin, the eagle is on the reverse that's why it's called a Eisenhower dollar. The 1977 coin has no silver regardless of mintmark and is likely only face value especially if it's from a bank or found in circulation.
The value of a 1982 silver eagle coin with a design of an eagle on the front and a map of North America on the back can vary depending on its condition and market demand. Generally, these coins are valued for their metal content and numismatic appeal, with prices typically ranging from around $25 to $40.