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· 8 min read

How to Keep an Engagement Ring Clean Without Damage

How to keep an engagement ring clean at home: the weekly soak and brush that works, what to avoid, and when an ultrasonic cleaner is a bad idea.

Warm water, a drop of mild dish soap and a soft toothbrush once a week will keep an engagement ring looking the way it did in the shop. What makes a ring go dull is a thin film of skin oil, soap and hand cream on the underside of the stone, not scratches on the top. Get that film off regularly and take the ring off before sunscreen, cleaning products and the pool, and you have covered about ninety per cent of ring care.

Why the film matters more than the polish

A diamond looks bright because light enters through the table, bounces off the inside of the pavilion and comes back to your eye. That bounce happens at the boundary between diamond and air. Coat the outside of the pavilion with a greasy layer and you change what happens at that boundary, so less light returns and the stone reads grey and flat. This is why a ring can look dead after two weeks of hand cream and perfectly bright ten minutes after a soak.

Scratching is a different problem and a much rarer one. The American Gem Society explains that the Mohs scale of hardness is "based on whether one of the gemstones could scratch another; the stronger one marks the softer one," with diamond sitting at the top. The same page adds a caveat worth remembering: the scale "is not like stairs, with one being incrementally stronger than the previous one, but more like stepping stones that are sometimes closer or further apart than others." So a diamond will not scratch in ordinary wear, but the gold or platinum around it will, and any softer accent stones will too.

Lab-grown and natural diamonds are the same material, so the routine below is identical for both. If you are still choosing, that decision affects price and paperwork rather than care, and you can compare stones in our loose diamond search.

The weekly clean, step by step

The American Gem Society's home cleaning method is the one I give customers, because it costs nothing and it is hard to get wrong:

  1. Make the solution: "a mixture of warm water and just a drop or two of a mild dishwashing detergent." Warm, not hot.
  2. Soak "your water-safe pieces for approximately 20 minutes in the solution." Use a bowl on a towel, not the sink. If you must work at the sink, plug the drain first.
  3. Brush gently: "use your soft-bristled brush to gently scrub the gemstones and the surrounding metal." A child's toothbrush is ideal. Spend most of the time under the stone.
  4. Rinse it "under warm running water to remove the excess solution."
  5. Dry on a lint-free cloth. Skip tissue and paper towel, which shed fibres that catch in prongs.

On frequency, the same guidance suggests cleaning every few months in general, and that frequently worn pieces such as rings or earrings should be cleaned more regularly, about once a month. For a ring worn every day through hand washing, sanitiser and moisturiser, once a week is more realistic and takes five minutes.

Where the dirt actually sits

Almost all of it collects where you cannot see it. The underside of the pavilion, the inner faces of the prongs, the seat where the girdle rests, the gap under the bridge that sits against your finger. Halo rings and pavé bands have far more small crevices than a plain solitaire, and a hidden halo under the centre stone is the hardest spot on any ring to reach. None of that is a reason to avoid those styles, it just means a longer soak and a more patient brush. If you are still comparing engagement ring settings, it is fair to weigh how much cleaning a design will ask of you.

What to keep away from it

  • Chlorine and bleach. The American Gem Society advises against "using cleaners with harsh chemicals like chlorine or bleach." This matters most for karat gold rather than the diamond, because the alloy metals mixed with the gold are what react. Take the ring off before a pool or a hot tub.
  • Abrasives. Toothpaste, baking soda and powdered cleansers will not hurt the diamond but will scratch the metal and take the crispness off a polished surface.
  • Ammonia around soft or organic gems. The same guidance says to avoid "ammonia-based cleaners when working with organic gems, like pearls." Ammonia-based window cleaner is fine on a plain diamond ring, but it is not a universal jewellery cleaner.
  • Sunscreen, hand cream and hair product. These are the main cause of the grey film. Put the ring on last, after everything else.
  • Impact. Prongs bend from knocks, not from dirt. Gym weights, moving boxes, gardening and kneading dough are all better done with the ring off and somewhere safe.

Ultrasonic cleaners, steam and paid cleaning

MethodWhat it removesMain riskSensible frequency
Warm water, dish soap, soft brushSkin oil, soap film, lotion, most daily grimeAlmost none if you plug the drainWeekly
Ammonia-based glass cleaner on a diamond-only ringStubborn greasy filmNot for pearls, opals or other porous gemsOccasionally, instead of soap
Home ultrasonic machineThe same film the soap removesVibration can shift an already loose stone; a bad idea on fracture-filled or heavily included stones and on soft gemsRarely, and never as a first response to a rattle
Jeweller's steam and ultrasonic, with inspectionEverything, including packed dirt under a haloLow, because someone checks the setting firstOnce or twice a year
Toothpaste, baking soda, bleachNothing usefulScratched metal, damaged alloyNever

The honest answer on home ultrasonic machines is that most people do not need one. They do not clean a diamond better than a soap soak and a brush, they cost more than the soap, and they carry a risk the soap does not: if a stone is already loose in a worn setting, the machine can be the thing that finishes the job. The same goes for branded jewellery cleaning solutions sold in small bottles. They are usually a detergent or ammonia solution, and dish soap does the same work. Save the money and spend it on a proper inspection instead.

Your metal changes the routine slightly

Platinum. To carry a platinum quality mark in Canada, the Competition Bureau requires that "the metallic content of the item must be one of the following: at least 95% platinum or an alloy of platinum that is at least 95% percent platinum and iridium or ruthenium," a rule set out in the Precious Metals Marking Regulations (C.R.C., c. 1303). Platinum scratches by displacing metal rather than losing it, which is where the soft grey patina comes from. Clean it exactly as above. Resist the urge to have it polished at every visit, because each polish removes a little metal for good.

White gold. Almost all white gold is rhodium plated, and the plating is a finish, not a cleaning problem. When a ring starts to look faintly warm or yellow at the back of the shank, that is plating wear, and no amount of scrubbing brings it back. Replating is a workshop job. Abrasive cleaners take the plating off faster, which is another reason to leave the toothpaste alone.

Yellow and rose gold. The Competition Bureau lists the accepted decimal marks as ".375 (9K), .416 (10K), .583 (14K), .750 (18K), .916 (22K)," and the regulations set a minimum of 9 karats in Canada, with the karat number in "the same proportion to the number 24 as the quality of the gold in the article is to pure gold." The practical consequence: 18K is softer than 14K and will show fine surface marks sooner. It does not need a different cleaner, just a gentler brush. Metal choice is part of finishing a design, and you can set it when you finish the ring.

Check the setting, not just the shine

Cleaning keeps a ring bright. Inspection keeps the diamond in it. As the American Gem Society puts it in its engagement ring care post from January 2017, "if you store your fine jewelry safely, clean it regularly and take it to the jeweler to be inspected when you can, it will likely stay in excellent condition."

Do a ten second check after every clean, while the ring is dry and in good light. Hold the shank and try to move the stone with a fingernail, since a stone should not shift at all. Hold the ring near your ear and tap it, because a faint rattle means a loose stone. Look at the prong tips for flattening or a thin, worn edge. Check that the centre stone has not rotated. For a ring worn daily, having a jeweller look at it once or twice a year is a sensible bench rule of thumb rather than a published standard, and it is worth more than any cleaning product you can buy.

What to do next

Tonight, put a bowl of warm water and a drop of dish soap on the counter, soak the ring for twenty minutes, brush the underside of the stone, rinse and dry it. Then make one habit change: the ring goes on last, after hand cream and sunscreen, and comes off before the pool and the gym. Book a setting check with a jeweller if it has been more than a year, and if you are still choosing a ring, browse the settings with an eye to how much cleaning each design will ask of you. Other guides on stones, metals and settings are on our blog.

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