M & M Gold Exchange notes that jewelers and others have long used the same tests, including applying nitric acid and attempting to attach a magnet to a metal piece, to verify an item is made of real gold. In the United States, anything less than 10 karats is not considered real gold.Know More
According to M & M Gold Exchange, the simplest way to test a piece of metal to see if it is gold is to attempt to attach a magnet to it. Gold is not magnetic. However, many of the metals used in fake gold jewelry and other objects are magnetic. Bear in mind that clasps and other parts of certain gold jewelry are often made of magnetic metal. Apply the magnet to the main portion of the piece to avoid making a mistake.
Hosts of the PBS television show "Antiques Roadshow" and their various experts frequently help guests determine whether family heirlooms and estate sale finds are real gold. They recommend applying nitric acid to residue from the object to check its authenticity. Do this by rubbing the object onto a piece of slate. Next, apply a small amount of nitric acid to the residual on the slate. If the acid completely dissolves the residual, the object is not likely gold. If any residual remains, it most likely is gold.Learn more about Precious Metals & Gems
Determine the authenticity and value of pearls by conducting the tooth test and inspecting the color, surface thickness, luster, shape and size of the pearl as well as any blemishes. This process does not require any specialized equipment.Full Answer >
Aside from never using the item, it is nearly impossible to prevent some white gold pieces from turning yellow. This is particularly true for jewelry. White gold jewelry, especially rings, has a tendency to gradually turn yellow due to natural erosion caused by friction and normal wear and tear.Full Answer >
One simple way to test if an item is real silver is to perform the ring test. Gently tap the silver item with something hard, such as a fingernail or another metal object. When tapped, silver produces a bell-like sound, which is higher-pitched when the percentage of silver is higher.Full Answer >
A silver mark 925 is the identification marking used to indicate an item is at least 92.5 percent silver. It is the most common silver marking and also identifies the piece as sterling, since all sterling silver must be at least 92.5 per percent silver.Full Answer >