The Gold Bug Calculator has a database of hundreds of different coins, bullion and jewelry items and the metal/coin info tool allows you to look up the exact metal content of any of these items.
The Database includes
Gold, Silver, Platinum and Palladium Bullion Coins
Mint Issued Bullion Coins from USA,Canada, Austria, Mexico,China, Australia,South Africa, UK, Isle of Man
Semi Numismatic Coins
Semi Numismatic Coins from all over the world (Pre 1933 US Gold Coins,British Sovereigns, Swiss and French Francs, Italian Lira, Russian Roubles, German Marks,Mexico, Hungarian Forints)
Junk Silver Coins
Junk Silver Coins from the USA, Canada,Mexico,UK,France,Australia,New Zealand