It is worth the price of silver, right now one troy once of silver is worth $27.35 but that changes daily or even hourly.
It's a silver round not a "coin" value is whatever the spot price of silver is at time of sale.
Current spot price is $21.79 per ounce.
The value of pure silver is determined by weight and market prices. As of 22 June 2013, silver is worth $19.85 per ounce.
The silver value of such a bar would be about $2.25 (based on the December 14, 2007 price of silver of $13.98 per troy ounce). An expert would need to see the design and condition of the bar to determine if it had numismatic value above the intrinsic metal value.
As of 12 March 2012, silver is worth $33.92 per ounce. 311 grams is 10.97 ounces, which gives a total value of $372.10. However, silver prices fluctuate regularly, so the value can change.
Silver sells for around $14/oz
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.
Below is a link to find the value of silver per ounce.
The intrinsic value is $14.16 with silver at $18.31 per ounce
Current value is $27.33 per ounce.
It varies depending on the rate of silver value. There is little to no collector value, so it is worth the bullion value of one ounce of silver.
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
The intrinsic value is $14.16 with silver at $18.31 per ounce. With silver at $47/oz, the silver value is $36.36.!!
As of 2-14-10 silver is $15.51 per ounce so that's the value of the coin.
It's not a coin, it's a bullion piece or "round". Its value is tied to the spot price of silver, currently about $12-$13 per ounce.
As of 1-1-11 the spot price of silver is $30.91 per ounce.
One ounce of silver is about $32.00 at present. Most people will only want it for its silver value.