Metallic silver is formed and used in conjunction with gold, with white color. this metal has the elements a little harder than gold and is very soft and supple, defeated only by gold and perhaps palladium. Pure silver has a thermal conductivity or heat and electricity are very high among all metals and has a very small contact resistance. This element is very stable in pure air and water, but immediately tarnished when exposed to ozone, hydrogen sulfide or air containing sulfur. benefits resulting from too many silver metal, besides used as accessory equipment and furnishings. Silver is also an important element of the compound in photography, because of their unique optical and about 30% of industrial consumption of silver is used for this field. Silver alloys are also used as a substitute for the artificial tooth, or a mixture of electronic materials
Silver comes from the Latin, namely Argentum and has the symbol Ag and atomic number 47. Silver is naturally present in the form argentite (Ag2S) and horn silver (AgCl). Silver ore, which is usually contained in mineral rocks are gray to black in appearance. These mineral deposits have the appearance of most shiny white, but not infrequently also do not like black because it consists mainly of various sulfide. Silver occurs naturally in ores and argentite (Ag2S) and horn silver (AgCl). The ore of tin, lead, tin, copper, gold and bronze-nickel are important sources to mine silver. The most important minerals containing silver is natural Silver (Ag), Argentite (Ag2S), Cerrargyrite (AgCl), Polybasite (Ag16 SB2 S11), Proustite (Ag2 As S3) and Pyrargyrite (Ag3 Sb S3). Most of the world's silver comes from hydrothermal deposits that fill cavities.
The most common precious mineral and ore rich in silver, including silver original was:
Acanthite Ag2S: Usually contains 87.1% silver ore from the heavy mineral rock
Cerargyrite ( AgC1 )Typically contains about 75.3% silver ore from the heavy mineral rock
Stephanite (Ag5SbS4) has about 68.5% silver content of heavy mineral ore rock
Polybasite (Ag, Cu) 3SbS6 silver ore contains approximately 65.10%
Bonanza grade silver ore can also contain various silver telluride minerals including Calaverite, Sylvanite and Hessite. To a lesser extent, base metal sulfides including Galena, sphalerite, pyrite, chalcopyrite, and chalcocite may all be and frequently are argentiferous, but in most silver ore deposits, the silver is most concentrated in the minerals of the group first named. Of the base metal ore minerals, the most common primary ones are argentiferous galena, sphalerite, and pyrite, while native silver and the sulphides and arsenides are less common.
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