Muenze Oesterreich AG, the Austrian mint that makes the best-selling gold coin in Europe, expects silver coin production to rise by up to 36 percent in 2011, Chief Executive Officer Gerhard ...

The double gold ducat, of the same purity, weighs 6.988 grams, measures 26 millimeters and costs $150. The .873-fine silver ducat weighs 28.25 grams, measures 40 millimeters and costs $47.50.