The principal ores of silver are argentite,horn silver and pyrargyrite. Their formulas respectively are:
- A$Ag_2S, AgCl$ and $AgSbS_2$
- B$AgCl, AgSbS_2$ and $Ag_2S$
- C$AgSbS_2, Ag_2S$ and $AgCl$
- D$AgCl, Ag_2S$ and $AgSbS_2$
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