Silver testing solution manufacturer and supplier. Place a drop of acid on the object to be tested.
Silver can be tested with RXSOL-62-5509-025, be careful as it involves as it contains and mixture of acid which can burn the skin. To apply on metal surface point tiny scratch on the item in an inconspicuous place and apply a drop of RXSOL-62-5509-025 to the spot. If the spot turns a creamy colour it is high quality silver, usually sterling. If it turns black it is coin quality silver and if it turns green it has high amounts of copper and therefore is poor quality silver and a gold colour means a lot of brass, it means this is a silver plated item.
Magnetic Test : Magnets are only attracted to ferrous (iron) materials, Silver is not magnetic. You can use a neodymium magnet (Rare Earth Magnet) for preliminary gold and Silver testing
Note: This article uses material from the http://rxmarine.com/