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.
When examining the number of international overnight visitors that destination cities attracted per city resident, Dubai emerges as the worldâs champion, with 5.7 visitors per resident, an increase of 0.8 percent over the 2014 figure. Istanbul is the world's eighth most popular city for tourists. International flights to Istanbul are cheaper when compared to the neighboring cities, so, in conjunction with its convenient geography, the city becomes a perfect starting point for trips across Europe, Asia, or North Africa.