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Overview
Precious metals are rare, naturally occurring metals that are valued for their beauty, durability, and long-term worth. In jewelry, the most common precious metals are gold, silver, and platinum. These metals are resistant to rust and corrosion, making them ideal for fine jewelry that can last a lifetime.
Magnet Test
Precious metals such as gold or silver do not contain magnetic alloys. A simple test to determine if your metal is of “precious” quality is to run a magnet over it. If the piece has any sort of reaction, even a slight pull towards the magnet, it is most likely not a precious metal and contains elements such as copper or nickel. It is important to note that a clasp will always be magnetic due to the internal spring and does not determine the entire authenticity of the piece.
Look for Stamps
Jewelry is usually stamped to provide information on what the piece is made out of. The stamp is usually very small and looks like an engraving. Here are the most common stamps you can look for when evaluating your jewelry.
Gold: 10k, 14k, 18k, 22k, 24k, 417, 585, 750, 916, 999
Gold plated: GP, HGE, GF, RGP
Silver: 925, STERLING, STER, STG, 999
Silver Plated: EP, EPNS, SP
Platinum: 950 PLAT, PT950, PT900
Palladium: 950PALL, PD950, PD, 500PD
But where are these stamps located? Here is a list with the most common places to look for stamps on your jewelry.
Rings: Inside the band, especially on the lower half
Bracelets: On/Inside of clasp, the end tab, a small tag near clasp
Necklaces: On/inside clasp, small tag near clasp, the end tab,
Pendants/Charms: On the bail, back side of pendant
Earrings: On post, the back of the earring
Pins: On the back side of pin, along the pin stem, near the hinge
Look for wear/color changes
Costume jewelry is typically made from base metals like brass or copper and then coated with a thin layer of gold or silver plating. Over time, everyday wear, moisture, lotions, and friction can cause that thin outer layer to wear off. When this happens, the underlying metal becomes exposed, which can lead to fading, darkening, or color changes.
Precious metals like solid gold, sterling silver, and platinum are different because the metal runs all the way through the piece — it isn’t just a surface coating. While they may develop a natural patina or need occasional polishing, they do not peel, flake, or wear down to a different color underneath.
Look for
- Fading or dulling of the gold or silver color
- Dark, copper, or silvery tones showing through underneath
- Uneven or patchy coloring
- Green or dark marks on the skin left from wearing jewelry