Cover graphic by KnackDaily.
Soak plain gold in warm water with a drop of dish soap for about fifteen minutes, brush gently with a soft toothbrush, rinse and pat dry. That handles solid gold on its own. The moment a stone is involved, the stone decides the method, not the metal.
Gold does not tarnish, the metals mixed into it do
Pure gold is chemically stubborn. It does not rust and it does not tarnish, which is why coins pulled from shipwrecks still gleam. Pure gold is also too soft to hold a prong or survive daily wear, so jewelry is alloyed with copper, silver, zinc, nickel or palladium. Those metals are not stubborn at all.
The karat number tells you how much of the piece is actually gold, and the rest is the part that reacts. Copper darkens with air and sweat. Silver forms a dull sulfide film when it meets sulfur, which shows up in some cosmetics, some foods and ordinary air pollution. So a low karat piece that looks grubby is not dirty gold, it is a reacting alloy, and a gentle soap soak brings it back without stripping anything.
Gold plate and vermeil are a different situation entirely. Those have a microscopically thin gold skin over brass or silver. Any scrubbing removes some of it, and there is no way to put it back short of replating, so plated pieces get a soft wipe and nothing more.
Check the setting before it goes anywhere near water
Hold the piece close to your ear and tap it lightly with a fingernail. A loose stone often gives a faint rattle. Then look at the prongs under a bright light and see whether any tip is worn flat, bent outward or missing. A long soak followed by brushing is exactly the situation where a stone that was already loose falls out and vanishes down the drain.
Put a strainer in the sink before you start, or work in a bowl of water set inside the basin. If anything looks loose, take the piece to a jeweler for a prong check first. Emeralds and some other stones are routinely treated with oil or resin to improve clarity, and hot water, detergent and ultrasonic vibration all strip that treatment out, which leaves the fractures looking more visible than they did before.
The soak that works on plain gold
- Warm water, not hot, with a few drops of plain dish soap stirred in.
- Soak for about fifteen minutes so the film of skin oil and lotion softens on its own.
- Brush with a soft baby toothbrush, paying attention to the underside of a stone where grime blocks light and makes a diamond look flat.
- Rinse in a bowl of clean water, never under a running tap over an open drain.
- Pat dry with a lint free cloth and leave the piece out until it is fully dry before storing it.
What each material can and cannot take
| Piece | Safe | Destroys it |
|---|---|---|
| Solid gold band, no stones | Warm soapy soak, soft brush | Abrasive polishes and toothpaste |
| Diamond in prongs | Soapy soak, brush behind the stone | Long soaks with worn prongs |
| Pearl, coral, amber, ivory | Damp cloth wipe only | Ultrasonic cleaners, ammonia, any soak |
| Opal and turquoise | Barely damp cloth, dried at once | Soaking, heat, detergent that pulls out water |
| Emerald | Quick wipe, cool water | Ultrasonic, hot water, strong cleaner |
| Gold plated or vermeil | Dry or slightly damp soft cloth | Brushing, dips, polishing cloths |
| Enamel or glued settings | Surface wipe | Soaking, which softens the adhesive |
Keeping it clean between soaks
Most of what dulls gold goes on before the jewelry does. Hand lotion, sunscreen, hairspray and perfume all leave a film that then collects dust, so putting jewelry on last and taking it off first does more than any cleaning session. Chlorinated pool water is worth avoiding too, since chlorine attacks the alloy metals over repeated exposure and can make solder joints brittle.
Store pieces separately rather than in one pile. Gold is soft enough that a diamond on a neighboring ring will scratch it, and a tangled chain gets damaged more in the drawer than on your neck. Soft pouches or a lined box with dividers solve that for almost nothing.
