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Pearls are the only jewelry material most people own that was grown by a living animal. That origin explains almost every rule for how to care for pearls: nacre is thin, layered, slightly porous, and softer than the glass, steel, and stone beside it in a jewelry box.
Pearls are not as fragile as people fear. Worn regularly and cleaned gently, a good strand lasts for decades. The damage comes from small, repeated exposures: perfume sprayed on while the necklace is already on, hairspray settling on the surface, a strand hung on a hook for years, chlorine from a pool.
This guide covers what nacre is, the order to put jewelry on, how to clean and store pearls, and when a strand needs restringing rather than another wipe.
What Nacre Is and Why It Changes the Rules
Nacre is built in layers: microscopic plates of aragonite, a form of calcium carbonate, bound by a protein called conchiolin. The layers overlap like bricks, which is what gives pearls their depth and orient, the soft glow that shifts as the pearl turns. Thicker nacre means more layers, more depth, and more tolerance for wear.
That structure is also the weakness. Nacre is soft, usually around 2.5 to 4.5 on the Mohs scale, compared with 5.5 for ordinary glass and 7 for quartz. It is porous enough to absorb oils and dyes, and it reacts with acids. Perfume, hairspray, vinegar, citrus, and sweat are all acidic enough to dull the surface over time. Chlorine and salt water attack the protein binder and the silk thread holding the strand together.
None of this means pearls should stay in a box. It means they need a small amount of attention at the right moments, and a storage spot that does not expose them to heat, sunlight, or harder jewelry.
The Last On, First Off Rule
The most useful habit is the order of dressing. Perfume, hairspray, lotion, and makeup go on first. Let them dry completely, then put on the pearls. At the end of the day, take the pearls off first, before changing clothes or starting a skincare routine.
This one rule prevents most of the damage people blame on "cheap pearls." Hairspray is especially persistent because the fine mist settles on the surface and dries into a film. Perfume leaves an acidic residue that etches the nacre where it lands. Makeup and sunscreen transfer from the neck and collect in the drill holes and between the pearls, where they are hard to remove.
If you forget and spray first, wipe the pearls with a soft damp cloth once the spray has dried, then dry them flat. Do not rub hard or use a jewelry polishing cloth, which is treated with a cleaning agent for metal.
How to Care for Pearls After Every Wear
Clean pearls after each wearing, not once a season. Wipe each pearl with a soft, damp cloth, then lay the strand flat on a dry towel to dry completely before putting it away.
For grime that a damp cloth does not lift, use a barely damp cloth with a drop of mild, fragrance-free soap, then wipe again with clean water. Do not soak the strand, run it under a tap, or submerge it in a bowl. Water trapped in the drill holes or silk weakens the thread and can leave a tide mark in the nacre.
Skip the ultrasonic cleaner, steam cleaner, and toothbrush. All three are standard advice for metal and hard stones, and all three are wrong for pearls. A brush abrades the surface, an ultrasonic bath can craze the nacre, and steam drives moisture and heat into the drill holes.
Dry the pearls flat and away from direct heat. A hairdryer, a radiator, or a sunny windowsill can dry the nacre unevenly and make it brittle. The fuller sequence for mixed-material jewelry is in this guide to cleaning jewelry at home safely.
What Never Touches Pearls
Some products are marketed as gentle and are still wrong for nacre. Keep these away.
- Ultrasonic and steam cleaners. Vibration and heat can damage the nacre and the silk.
- Ammonia, bleach, vinegar, and lemon juice. Acids and alkalis attack the protein binder.
- Toothpaste and baking soda. Abrasive particles scratch the surface and dull the luster.
- Silver dip and tarnish removers. Formulated for metal, not for a porous organic gem.
- Hair dryers and hot water. Rapid drying and heat cause cracking and dulling.
- Swimming pools, hot tubs, and showers. Chlorine and soap residue degrade nacre and thread.
If a jeweler offers to "refresh" a strand with a machine, ask what the process involves before agreeing. Hand cleaning with a soft cloth and mild soap is usually all a pearl needs.
Store Flat and Separate
Pearls should be stored flat, in a soft pouch or a compartment of their own, away from harder jewelry. Hanging a strand on a hook puts the weight of the pearls on the silk thread, and over months the thread stretches. Lying flat distributes that weight and keeps the strand's length intact.
Separation is just as important. Diamonds, sapphires, and even silver chains can scratch nacre, and a tangled chain can cut into a pearl. A silk or velvet pouch, a lined compartment, or the original box with a soft interior is enough. Avoid airtight plastic bags for long-term storage; a little humidity is better than a completely dry environment, which can make nacre brittle over years.
Keep pearls out of direct sunlight and away from radiators, heating vents, and the top of a wardrobe where temperatures swing. A dry, dark drawer at room temperature is close to ideal. If you own a safe, think twice about storing pearls there long term; the very low humidity of a sealed safe is not friendly to nacre.
For larger collections, a compartmented jewelry box or a dedicated roll does the job. The jewelry section of this accessory wardrobe audit explains how to separate soft gems from hard ones without adding another layer of boxes.
When a Strand Needs Restringing
Restringing is the maintenance task pearl owners postpone too long. The silk thread stretches, absorbs moisture, and frays, and when it fails it usually fails near the clasp, scattering pearls across a floor.
Check the strand every few months. Hold it up and look for gaps between pearls, a frayed thread at the clasp, or pearls that slide loosely rather than sitting snugly. A strand that has visibly stretched, or that hangs differently than it did a year ago, is due. So is one bought secondhand with an unknown history.
How often depends on wear. A strand worn weekly might need restringing every one to two years; an occasional strand can go longer. Many jewelers recommend restringing annually for daily wear, but the condition of the thread matters more than the calendar. If in doubt, ask a jeweler to inspect it; the check is quick and usually free.
Ask for hand-knotting between each pearl. The knots prevent pearls from rubbing and keep them from scattering if the thread breaks. Silk is traditional and drapes well; some jewelers use synthetic thread for durability. Either is acceptable, but the knotting should be tight and consistent, and the clasp should be checked or replaced at the same time.
Restringing is also the moment to have the pearls cleaned properly and the drill holes checked. Ask the jeweler to note any pearls with cracks, chips, or worn nacre, because those may need replacing rather than restringing. See a jeweler promptly if the nacre is peeling or a pearl has been exposed to bleach or solvent, and never try to polish away dullness with an abrasive; nacre is thin, and every abrasive pass removes material that cannot be replaced.
Pearls for Weddings, Heat, and Travel
Pearls suit formal events, which is also when people wear perfume and hairspray most heavily. For a wedding, put the pearls on after hair and makeup, and take a soft pouch for the journey home rather than dropping the strand into a handbag with keys and a phone.
Heat and humidity are manageable if the pearls are cleaned and dried before storage. In summer, wear them for the evening rather than a full day outdoors, and wipe them when you take them off; pearls are not the most forgiving material in heat, and sweat leaves an acidic film that dulls nacre.
For travel, a small padded roll or a dedicated case prevents the strand from tangling with other jewelry. Keep pearls in the cabin bag rather than checked luggage, and do not leave them in a hot car. A case that holds the strand flat matters more for pearls than for other jewelry: never hang them in a hotel bathroom where steam collects.
Bridal sets often combine pearls with metal and crystals, and the metal can be cleaned normally while the pearls cannot. This guide to choosing bridal jewelry sets is useful for planning, and this roundup of bangle bracelets for wedding guests shows how pearls are usually mixed with harder materials.
Imitation, Freshwater, and Fine Pearls
Care advice is broadly the same across types, but the stakes differ. Imitation pearls are usually glass or plastic beads coated with a lacquer or pearlescent paint. The coating can peel or wear through, especially where it rubs against skin or other jewelry, and it will not heal with polishing. Clean imitation pearls with a damp cloth only, and avoid perfume for the same reason you would with real nacre: the coating is sensitive to solvents.
Freshwater pearls are usually solid nacre throughout, which makes them more tolerant of light wear than a thin-coated bead. Akoya pearls have a thinner nacre layer over a mother-of-pearl bead and benefit most from gentle handling. South Sea and Tahitian pearls carry thicker nacre and are more forgiving, but they are also more valuable, which is a reason for care rather than an excuse to relax it.
If you are unsure what you own, a jeweler can tell you with a quick look and sometimes a simple test. Imitation pearls feel smooth and uniformly round, and the surface is usually perfect in a way real nacre rarely is. Real pearls have tiny surface imperfections and feel slightly cool and gritty against a tooth, though that test is best left to a professional if the piece matters.
Frequently Asked Questions
Can I wear pearls every day?
Yes. Regular wear is good for pearls, provided you clean them after each wearing and keep them away from perfume, hairspray, and water. The traditional idea that body oils keep pearls lustrous has some truth, but the oils still need to be wiped off before storage.
Can pearls get wet?
Brief contact with a damp cloth is fine. Soaking, showering, swimming, and dishwashing are not, because water weakens the silk thread and chlorine or soap residue damages the nacre. Dry pearls flat before putting them away.
How often should pearls be restrung?
Every one to two years for a strand worn often, longer for occasional wear. Check for frayed thread at the clasp, gaps between pearls, and a stretched strand. If any of those appear, restring sooner rather than waiting for the thread to break.
Can I use an ultrasonic cleaner on pearls?
No. Ultrasonic vibration and heat can crack nacre and damage the silk. Use a soft damp cloth with a little mild soap, wipe with clean water, and dry flat. The same applies to steam cleaners and silver dips.
Should pearls be stored in a safe?
Usually not for long periods. Sealed safes are very dry, and nacre can become brittle without some ambient humidity. A soft pouch in a dry drawer at room temperature is better, away from direct sun and heat.