Impossible; but silver can react with the H2S (hydrogen sulphide) from the atmosphere and the surface become black. This black sulphide can be easy removed.
No, they are not. Silver is a shiny, lustrous, bright, silvery-white metal which is very common for making ornaments and is used in solar cells also. It is represented by Ag. Silver Chloride is a...
Yes. Heating it before pounding makes the job a lot easier and keeps the edges from tearing as much, and rolling between steel rollers helps uniformity of thickness in the last steps.
925 is the Sterling Silver mark of purity. It can only be used for silver, never ever for plate. If it was asseyed in England for example it would also, by law have to be stamped with the Assey...
US Silver quarters (produced as regularly circulated coinage through 1964, and as part of silver proof sets since the early 1990's) are an alloy of 90% silver and 10% copper. They are not plated, but...