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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,
Silver testing solution manufacturer and supplier. Place a drop of acid on the object to be tested.
90 to 100% silver, the acid will show a creamy color.
77-90% silver, the acid turns a gray color.
65-75% silver, then the acid will show a light green color.
90 to 100% silver, the acid will show a creamy color.
77-90% silver, the acid turns a gray color.
65-75% silver, then the acid will show a light green color.
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
Pure silver will turn the solution bright red ( creamy colour ), STERLING SILVER will turn it dark red ( Black ), low grade COIN SILVER (0.800 fine) will turn brown ( green, largely due to the presence of copper which turns the solution brown / green ) and even green for 0.500 silver.
If you cannot find a mark or a stamp on the piece and you are looking for sterling silver, it does not mean it is not silver, many countries do not require that precious metal items be stamped.
Chemical test method - Follow above application BLOCK.