For silver the more important deposits commercially are such compounds as the minerals tetrahedrite and argentite (silver sulfide, Ag 2 S), which is usually associated with other sulfides such as those of lead and copper, as well as several other sulfides, some of which contain antimony as well.
France is the most visited European nation with 83.7 million international tourist arrivals in 2014. Established in the late 1700s, the Louvre Art Museum in Paris is one of the most frequented tourist sites in all of France. Europe is a fascinating continent, and it attracts millions of tourists annually.
If you guessed London, New York or Paris, you would have guessed wrong. According to the recently released Global Destinations Cities Index by MasterCard, an Asian city tops the list of having the most international visitor arrivals in 2013. The winning city narrowly inched out London, the top spot in 2012, for the No. 1 spot by 200,000 visitors. This year is the first time since the launch of the Index in 2010 that an Asian city came in at No. 1.