Why Pearls Need a Gentler Approach

Pearls are built from layers of nacre, a blend of calcium carbonate and a protein binder, which makes them far softer than most gemstones. On the Mohs scale they sit somewhere between 2.5 and 4.5, so a fingernail can scratch them and a stray grain of grit in a jewellery box can leave a permanent mark. That softness is also what gives pearls their glow: light passes through the nacre layers and bounces back as lustre, rather than the hard sparkle of a faceted stone.

The practical consequence is simple. Anything that dissolves or abrades nacre will dull a pearl permanently, and no amount of polishing brings it back. Perfume, hairspray, sunscreen, hand cream and the natural oils from your skin all sit on the surface and, over time, creep into the layers. The answer is not a stronger cleaner but a gentler, more frequent routine.

What You Will Need

• A bowl of lukewarm water, never hot. Tap water is fine if your area is not heavily chlorinated; filtered water is better still.
• One drop of mild, pH-neutral soap. Plain baby shampoo or a fragrance-free, dye-free washing-up liquid works well. Nothing labelled antibacterial, exfoliating or brightening.
• Two soft cloths, ideally lint-free microfibre or a well-worn cotton handkerchief. Avoid paper towels, which are abrasive.
• A soft make-up brush or a clean, unused baby toothbrush for textured clasps and the gaps around settings.
• A dry towel to rest the piece on while it dries.

Never use a cloth that has held metal polish or silver cleaner. Traces of ammonia transfer easily and will dull a pearl on contact.

Step-by-Step Cleaning

• Fill the bowl with lukewarm water and add one small drop of soap. Swirl it with your finger rather than shaking it into a lather.
• Dip the pearls and wipe each one gently with your fingertips. Roll the pearl between finger and thumb rather than rubbing back and forth.
• Use the soft brush only around the clasp, the drill holes and any metal findings. Keep strokes light and short.
• Lift the piece out and rinse in a second bowl of clean lukewarm water, or hold it under a slow trickle. Never let water run at force into a knot or drill hole.
• Pat dry with the first cloth, then lay the piece flat on the towel. Leave it for several hours, ideally overnight, until the thread feels completely dry.
• Buff with the second, dry cloth just before wearing. This is what restores the surface sheen.
• Repeat after every few wears, particularly in summer, when sweat and sunscreen build up quickly.

One important detail: never hang a wet strand to dry. Silk thread stretches under the weight of water, and the necklace will sit longer the next time you wear it.

What to Avoid, and Why

• Ultrasonic and steam cleaners. Both are fine for diamonds and harsh on nacre. Vibration and heat lift layers and can loosen settings.
• Ammonia, vinegar, lemon juice, baking soda and toothpaste. All are mildly acidic or abrasive, and all will strip lustre.
• Silver dips and metal polishes. Useful on the clasp, disastrous on the pearl. Apply polish with a cloth wrapped around a fingertip, keeping clear of the pearls entirely.
• Alcohol-based sanitiser and perfume. Let perfume settle and dry before you put your pearls on, and take them off before you spray.
• Chlorinated pools, hot tubs and prolonged sun. Chlorine etches the surface and strong sunlight can yellow white pearls.
• Airtight plastic storage. Nacre needs a little ambient moisture; sealed bags can dry pearls out.

Restringing, Storage and Daily Habits

A strand worn regularly should be restrung every year or two, or sooner if you notice fraying near the clasp, stretching between the knots or a gap appearing between pearls. Knotted silk between each pearl is the traditional standard for a reason: it stops one break from scattering the whole strand.

Store pearls flat in a soft pouch or a lined compartment, away from harder jewellery. A pearl stored loose beside a diamond ring will lose. Put them on last when dressing and take them off first when you get home.

Rustic-Inspired Styling

Clean, well-cared-for pearls have a soft, uneven glow that sits naturally with rustic textures: linen shirts, chunky wool knits, raw silk and natural dyes in oat, clay and moss tones. A single strand worn over a collar in autumn looks considered rather than formal, and baroque or slightly irregular pearls suit this style best because their shapes echo hand-thrown pottery and weathered wood.

For layering, mix pearls with a leather cord, a slim antique brass chain or a matte wooden bead. Keep metals to one warm tone so the pearls stay the focal point, and choose matte finishes over high polish. A pearl drop on a simple oxidised hoop, or a short strand wrapped twice at the wrist, gives the same relaxed feel with less fuss.

Whatever the styling, the care stays the same: gentle soap, lukewarm water, a soft cloth and a little patience. Treated that way, pearls keep their lustre for decades.