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.
International tourist arrivals increased by five percent in 2013, according to the UNWTO. That translates to a record of more than one billion trips. With its population of 1.36 billion, China has become the second-largest exporter of tourists. Russia, now the fifth-largest outbound market, increased travel spending by 26 percent. Like it or not, theme parks clearly have worldwide appeal. Franceâs Disneyland Park draws about the same number of visitors (10.5 million) as SacrÃ© Coeur, and four of the worldâs 20 most-visited tourist attractions are Disney parks. Many inspiring and iconic places canât quite keep up.