How To Clean A Diamond Ring At Home

Most people who think their diamond has lost its sparkle have a perfectly good diamond with a film of hand cream on the underside of it.

That is not a joke. It is by a wide margin the most common reason a ring stops looking right, and the fix takes ten minutes with things already in your kitchen.

Here is the method that works, the ones that damage things, and the point at which a ring needs somebody with proper equipment.

Why the underside is what matters

Worth understanding, because it changes how you clean.

A diamond works by letting light enter through the top, reflecting it around inside the stone, and sending it back out through the top toward your eye. The angled facets on the lower half of the stone, the part facing your finger, do the reflecting.

Which means the surface that has to be clean is the one you never look at.

Hand cream, sunscreen, soap residue, cooking oils and general daily life all collect in the space between the stone and the setting. A greasy film there interrupts the light path completely, and the stone goes flat and grey even though the top surface looks fine.

Polishing the top of a dull ring achieves almost nothing. Cleaning underneath it achieves everything.

The method

What you need: a small bowl, warm water, ordinary dishwashing liquid, a soft toothbrush, a lint-free cloth.

One. Half fill the bowl with warm water, not hot. Warm is enough and hot water risks thermal shock in some stones and can loosen old adhesives in antique pieces.

Two. Add a drop or two of dishwashing liquid. Plain is better than anything with added moisturiser or antibacterial agents.

Three. Soak the ring for ten to twenty minutes. This does most of the work by softening the film so you barely have to scrub.

Four. Brush gently with the soft toothbrush, concentrating on the underside of the stone, around the base of each claw and inside the gallery. Use the tip of the brush to get underneath the setting.

Five. Rinse in clean warm water. Do this in a bowl, not over an open drain, for reasons that should be obvious and which a great many jewellers could tell you stories about.

Six. Pat dry with a lint-free cloth and let it air dry completely before putting it away. Moisture trapped under a setting encourages tarnish on the metal.

Do this fortnightly and most people will never need anything else.

The things people use that they should not

Toothpaste. This appears in every home remedy list and it is bad advice. Toothpaste is abrasive by design, and its abrasive is harder than gold and platinum. It will put fine scratches into the metal. It will not scratch a diamond, but the ring is not made entirely of diamond.

Bicarbonate of soda. Also abrasive. The foil and bicarb trick works well on tarnished silver and has no business anywhere near a set stone, because it is a chemical reaction you cannot control around glued or treated material.

Bleach and anything containing chlorine. Chlorine attacks the alloys in gold, weakening the metal and eventually causing failure at solder joints. This is why you should also take rings off in swimming pools and spas.

Ammonia, on anything other than diamonds. Fine on a plain diamond ring in good condition, and damaging to several other stones.

Vodka, ketchup, cola and the rest of the internet. Either ineffective or acidic. Nothing here outperforms warm soapy water.

Boiling water. Thermal shock can fracture stones with existing inclusions, and it can damage treated stones.

Ultrasonic and steam cleaners

Both work extremely well on the right piece and cause real damage on the wrong one.

Ultrasonic cleaners use high frequency vibration through liquid to dislodge dirt. They are superb on a plain diamond ring in sound condition. The risks are that vibration can loosen a stone already sitting on worn claws, and that it can damage fragile or treated material.

Steam cleaners blast hot vapour at the piece and are excellent at clearing what a soak has already loosened. The heat is the risk.

Safe in both, generally: diamond, sapphire and ruby in good claw or bezel settings, in gold or platinum.

Not safe: pearls, opals, emeralds, turquoise, malachite, amber, coral, and anything you know has been fracture-filled, oiled or dyed. Also anything with visible large inclusions, which can propagate into a crack.

Unknown: if you do not know what your stones are or how they have been treated, ask before buying a machine.

Different stones need different handling

Soapy water is safe for almost everything. Beyond that, the variation is significant.

Diamond, sapphire and ruby are hard and chemically stable. Treat them as above and they are essentially indestructible in domestic conditions.

Emerald is comparatively brittle and almost always treated with oil or resin to improve the appearance of internal fractures. Detergent and heat strip that treatment, which makes the inclusions more visible. Wipe with a barely damp cloth and nothing more.

Opal is porous and contains water. It can craze and crack if it dries out or is heated, and it absorbs oils and detergents. Damp cloth only.

Pearls are the most vulnerable thing in most jewellery boxes. The nacre is soft and is damaged by acid, detergent, perfume, hairspray and ultrasonic vibration. Wipe with a soft damp cloth after wearing, and never soak, because water degrades the silk thread on a strand.

Turquoise, malachite, amber and coral are all porous or soft. Damp cloth.

Tanzanite is comparatively fragile and dislikes sudden temperature change.

The general rule is straightforward: if the stone is not a diamond, a sapphire or a ruby, look it up before you put it in anything.

The metal matters too

Platinum is essentially inert. It develops a soft satin patina with wear, which is not damage and can be polished back by a jeweller whenever you prefer the mirror finish.

Yellow and rose gold clean well with the method above and need nothing special.

White gold needs a specific note. It is yellow gold alloyed with white metals and then plated with rhodium to produce the bright white finish. That plating wears off over roughly two to four years, revealing a warmer tone underneath.

Cleaning does not cause this, but aggressive polishing accelerates it. Do not use polishing cloths impregnated with compound on white gold, because you are polishing away a thin plated layer.

If your white gold ring has gone slightly yellow, it needs replating, which is a routine and inexpensive job.

Silver tarnishes and is a different problem. Polishing cloths and silver dips work, but keep dips away from any set stones.

Storing it properly

Cleaning is undone by bad storage.

Diamonds scratch everything, including other diamonds and all your metal. Store pieces separately in soft pouches or a divided box. A dish of jewellery is a dish of jewellery scratching itself.

Keep pearls and opals away from anything airtight and away from direct heat.

And choose one place for a ring to live when it comes off, and always use it. More rings are lost in transit between the hand and the safe place than are lost while being worn.

How often is often enough

There is no single answer, because it depends entirely on what your hands do.

Fortnightly suits most people wearing a ring daily through ordinary life. Cooking, hand cream, soap, general wear.

Weekly if you use a lot of hand cream or sunscreen, work with your hands, or live somewhere hot where sunscreen is a daily habit. Sunscreen in particular builds up faster than anything else and is the single worst offender for dulling a stone.

Monthly is plenty if the ring is worn occasionally rather than daily.

Immediately after gardening, the beach, a swim, or anything involving dough or paint. Not because of damage, but because material trapped in a setting is abrasive and works its way in.

The honest test is simply to look at it. A diamond that has gone flat under ordinary indoor light is telling you it needs twenty minutes in a bowl.

Prevention beats cleaning

A few habits that reduce how often this is necessary at all.

Take the ring off before hand cream and sunscreen. Both go straight onto the underside of the stone otherwise, and this single habit halves how quickly a ring dulls.

Take it off for cleaning products, particularly anything containing bleach.

Take it off for gardening. Soil is abrasive and gets deep into settings.

Take it off at the gym. A barbell against a band will bend it, and a bent band means a stressed setting.

Put it on last when dressing and take it off first. Perfume, hairspray and lotion all reach jewellery before it goes on otherwise, which matters enormously for pearls and somewhat for everything else.

When it needs a professional

Home cleaning handles appearance. It does not handle the things that cause actual loss.

Once a year, have a jeweller check the setting. Claws wear thin with ordinary contact and eventually give way, and by the time a stone is visibly loose you have been lucky. A claw retipped at a routine appointment costs very little. A lost stone costs the stone, and warranties rarely cover it.

Between checks, hold the ring to your ear and tap the stone gently with a fingernail. A rattle means movement. Movement means book an appointment.

Go sooner if the ring has taken a hard knock, the band looks oval rather than round, a claw catches on fabric, or a stone looks different.

A professional clean also reaches places a toothbrush does not, and a jeweller will usually do it while checking the setting.

Workshops that do their own repairs and setting on site are the ones worth building a relationship with, because they can look after a ring for decades rather than sending it away. Australian studios working this way, Stelios Jewellers among them, generally offer cleaning and inspection as a routine service, and an annual appointment is the cheapest insurance available on a piece you wear every day.

Antique and inherited rings

One category that deserves more caution than a modern ring, because the risks are different.

A piece that is eighty or a hundred years old has had a very long time to accumulate wear you cannot see. Claws may be thin. The shank may have worn through in places. Old settings sometimes used adhesives that modern cleaning will dissolve.

Older stones are also frequently set in closed-back settings, where metal sits behind the stone rather than leaving it open. Water trapped behind a closed back cannot dry out and will corrode the metal from the inside. If you can see that the back of the stone is enclosed, do not soak it. Wipe it instead, and let a jeweller clean it properly.

Foiled stones, where a thin reflective backing sits behind the gem to improve its colour, appear in genuinely old jewellery and are ruined by water.

If you have inherited something and do not know how it is constructed, the safe move is a barely damp cloth and an appointment. An antique piece is worth having assessed anyway, since old stones frequently turn out to be worth considerably more than the family assumed.

The short version

Warm water, a drop of dishwashing liquid, a twenty minute soak, a soft toothbrush on the underside, rinse in a bowl rather than over a drain.

No toothpaste, no bicarb, no bleach, no boiling water.

Check what your stones are before using an ultrasonic cleaner, and keep pearls, opals and emeralds away from everything except a damp cloth.

And book a setting check once a year, because a clean ring with a loose stone is still a ring about to lose a stone.

This article is general information only. Cleaning suitability varies by stone and treatment. Confirm with your jeweller before using any machine or chemical cleaner.