The Magnet Test Most precious metals-like gold and copper-are nonmagnetic, and silver is no exception. Grab some magnets and see if they are drawn to your object. "Silver is not noticeably magnetic, and exhibits only weak magnetic effects unlike iron, nickel, cobalt, and the like," says Martin.
Real silver turns black gradually and relatively slowly, but vinegar can step it up a notch and speed up the process. So, if you put silver bars in vinegar and leave them for 48 hours, a black residue will form on the surface of each piece.
Look for the 925 marking.Genuine sterling silver jewelry will be marked with these three numbers or STERLING or STER. Hold a magnet to the silver. If the magnet sticks, your jewelry is not real sterling silver. Smell the sterling silver.If it smells strongly metallic, then your jewelry is not real sterling silver.
Silver is not magnetic, not even with the strongest magnet. However, silver is diamagnetic. If you hold a silver coin at 45 degrees a suitable magnet will slide down it slowly. This is because the moving magnet sets up an 'electrical field'* that slows its fall.
The Ice Test
"Silver has the highest thermal conductivity of any common metal or alloy," explains Martin. "Even at room temperature, authentic silver products will melt the ice at an exceedingly rapid rate. If it melts fast(er), it probably is silver."
If you do not see the sterling marking, the item is probably silver plated. Check the colouring of the item carefully; genuine silver is generally less shiny and colder in tone than silverplate. If you see places where the silver appears to be flaking off or turning green, the item is silver plated.
What If You Can't See A Hallmark? There is an exemption to the hallmarking rules whereby any sterling silver items that weigh less than 7.78 grams do not need to be hallmarked. This means that small items such as earrings and some light bracelets do not need to be hallmarked.
Miller's Silver Marks app is the only product that will enable you to identify an unknown piece of silver from any country around the world – quickly and confidently. It is an essential tool for collectors, academics, dealers and students.
The Lighter Test
Choose a rather inconspicuous area of your jewelry piece for this test. Heat that area moderately with a lighter and watch the reaction. A dark black stain means the metal is authentic silver.
Silver becomes black because of hydrogen sulfide (sulfur), a substance that occurs in the air. When silver comes into contact with it, a chemical reaction takes place and a black layer is formed. Silver oxidizes faster in places with a lot of light and high humidity.
Silver can be tested with nitric acid, be careful as it involves using an acid which can burn the skin. To apply you make a tiny scratch on the item in an inconspicuous place and apply a drop of nitric acid to the spot. If the spot turns a creamy colour it is high quality silver, usually sterling.
Testing for Silver
Place a drop of acid on the object to be tested. • . 925 silver and above, the acid will turn red. 70-89% silver, the acid will turn green/brown.
Can you really test the purity of a medal by biting it? Not without a lot of practice. In their pure forms, gold and silver happen to be very soft metals—soft enough that you should be able to mark them with your teeth.
The easiest way to tell if sterling silver is real is by finding the imprint on your piece. Rings, necklaces, and bracelets made of sterling silver will have a “925” stamp somewhere. On rings, the stamp is usually on the inside band. Bracelets and necklaces will often have them on the clasp or on a seperate charm.
The jeweler will most likely conduct a simple and quick acid test that involves using a special solution. In this test, they place a drop of acid on the piece. If the color of the acid remains the same, you have a true silver piece.
Search through drawers, closets, attics and basements to uncover silver or silver-plated items. Silverware, old medals, pins, jewelry, old awards and plaques all have the potential to contain silver. Old U.S. coins minted before the mid-1960s are another source of scrap silver.
Markings
There are markings such as “S925”, “. 925”, and “925”. This gives assurance that the silver is indeed a 925 sterling silver. However, there are some sterling silver that don't have these marks so don't directly assume that the silver is fake if it doesn't have the mentioned markings.
The greenish discoloration on your body is called patina, and is caused when the copper alloy in your jewelry reacts with water, oxygen, CO2, acid on the skin, or from hand sanitizer. Despite what you may have heard, however, this happens because of the metal's composition—not because it's “fake” or low-quality silver.
Silver hallmarks are one of the most important factors in identifying antique silver jewelry, flatware, and other items. These small stamped symbols on the back or underside of silver items can tell you the purity of the silver, the manufacturer of the piece, and sometimes even the date it was made.
Silver is a very reactive metal. It loses its original shine because it chemically reacts to your physical composition and environment. Sweat, sickness or a boozy weekend can all change your body chemistry causing your silver to turn black. A light polish with your cloth usually takes it away.