If it's a 999-fine silver bullion, it would be worth approximately the spot price of silver or around $13.
It varies with the spot price of precious metals. Right now it is about $21.
Check the spot price of silver in the financial section of your daily newspaper or on kitco.com. These art bars usually trade a few percentage points above or below the spot price.
Helen of Troy
Hector of troy
Helen of Troy
Gold was fixed at £832 per Troy Ounce on 1st October 2010. A Troy Ounce is 31.1035 grammes. Your coin therefore has a 'scrap' value of £133 at these prices. It may be worth slightly more collectors' or numismatic value.
Current spot price is $21.79 per ounce.
How many tenths gold coin in a troy ounce
The value is just for the silver, about $28.00
The current spot price of silver is about $14/oz
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.
A troy ounce is about 31 grams and the US standard ounce (avoirdupois) is about 28 grams. When buying coins, or gold or silver, you get more by getting a troy ounce. The price of gold and silver is in troy ounces. So, for example, if gold is $1400 an ounce, that price is for a troy ounce. A 28 gram ounce of gold is not worth $1400.
Its value is based only on the gold it contains -- currently about $680 Current gold prices can be found at www.kitco.com
Assuming it contains .1867 of a Troy ounce, then it would take 5.36 coins for a Troy ounce.
One ounce of silver is about $32.00 at present. Most people will only want it for its silver value.
It's not really from 1799. The "one troy ounce" is a giveaway that it's a modern bullion coin, worth slightly more than whatever the current spot price of silver is.
Sorry but no U.S. coins dated 1958 weigh "One Troy Ounce". Look at the coin again an post new question.