Cleaning opal jewellery is straightforward — but the method depends entirely on whether you're dealing with a solid opal, a doublet, or a triplet. Get this distinction wrong and you risk cloudiness, cracking, or layer separation that can permanently damage the stone.
We clean, inspect, and repolish opals for customers at our Sydney showroom regularly. Over 15 years and thousands of pieces, we've seen the full range of damage — from stones dulled by years of hairspray buildup to doublets ruined by a single cycle through a dishwasher. Almost all of it was preventable with basic knowledge.
Here's how to clean and care for every type of opal correctly.
First: Know What Type of Opal You Have
This is the single most important step. Solid opals, doublets, and triplets have different tolerances for water, and the care instructions diverge from there.
Solid opals are one continuous piece of natural opal — no backing, no layers, no adhesive. These are the most durable and the easiest to clean. Water will not damage a solid Australian opal.
Doublets consist of a thin opal slice bonded to a dark backing with adhesive. Water exposure can soften the glue, causing cloudiness or layer separation over time.
Triplets add a clear dome cap on top of the opal slice. The same water sensitivity applies — the adhesive bonds between all three layers are vulnerable to prolonged moisture.
Not sure which you have? Look at the stone from the side. A solid opal shows natural, irregular transitions between the precious opal and any host rock. A doublet or triplet shows a perfectly straight, clean seam line where layers are bonded. If your opal is in a closed bezel setting that hides the edges, check your purchase receipt or ask a specialist — it matters for care.
For a full explanation of the structural differences, see our guide on doublets, triplets, and solid opals.
How to Clean a Solid Opal
Solid Australian opals are non-hydrophane — they don't absorb water, and brief water exposure poses no risk at all. Here's the method we recommend:
Step 1: Fill a small bowl with lukewarm water. Add a few drops of mild soap — plain dish soap works fine. Avoid anything with bleach, ammonia, or harsh detergents.
Step 2: Place the opal jewellery in the soapy water and let it soak briefly — two to three minutes is plenty. This loosens any dirt, oil, or skin residue that's accumulated on and around the stone.
Step 3: Use a soft-bristled toothbrush or microfibre cloth to gently clean the stone's surface. Pay attention to the back of the stone and the area where the opal meets the metal setting — this is where grime tends to build up, especially on rings.
Step 4: Rinse under lukewarm running water. Keep the temperature consistent — don't go from hot soapy water to cold rinse water, as sudden temperature changes can stress the stone.
Step 5: Pat dry with a soft, lint-free cloth. Avoid paper towels or rough fabrics — opal is roughly 5.5 to 6.5 on the Mohs hardness scale, which means even household dust (typically 7 to 7.5 on the Mohs scale) can scratch it.
That's it. No special equipment, no proprietary solutions. If your opal has diamond accents in the setting, the diamonds may look dull even after cleaning the front — try brushing the back of the setting with the soapy toothbrush to clear any buildup behind the diamonds.
How to Clean Opal Doublets and Triplets
The key difference: never submerge or soak a doublet or triplet in water.
The adhesive that bonds the layers is vulnerable to moisture penetration. Prolonged water exposure — whether from soaking, swimming, showering, or even repeated dishwashing — can cause the glue to soften. The result is either a foggy, cloudy appearance between the layers (water trapped inside) or actual physical separation of the opal slice from the backing.
Step 1: Dampen a soft cloth or microfibre towel with lukewarm water and a drop of mild detergent.
Step 2: Gently wipe the opal surface and the metal setting. Don't scrub hard — you're removing surface dirt, not deep cleaning.
Step 3: Wipe again with a clean, slightly damp cloth to remove any soap residue.
Step 4: Dry immediately with a soft cloth. Don't leave the piece damp.
That's the entire process for doublets and triplets. No soaking, no running water, no immersion. If the piece needs deeper cleaning than a wipe-down can achieve, bring it to a professional rather than risking water damage.
What Not to Do With Opal
More opal damage comes from what people do wrong than from normal wear. Here are the specific things to avoid:
Ultrasonic cleaners. These are standard in most jewellery stores for cleaning gold and diamond pieces — but they can crack solid opals through intense vibration and cause catastrophic water penetration in doublets and triplets. If you take your opal jewellery to a jeweller for cleaning, make sure they know it contains opal before they drop it in the ultrasonic.
Steam cleaners. The combination of high heat and moisture can cause thermal shock, leading to cracking or crazing (a network of fine surface fractures).
Harsh chemicals. Bleach, ammonia, alcohol-based sanitisers, and caustic cleaning products can all damage opal. Even everyday products — hairspray, perfume, sunscreen, and hand lotion — can leave residue that dulls the surface over time. The rule we give customers: put your opal jewellery on last (after cosmetics) and take it off first (before cleaning).
Abrasive cleaners. Some guides suggest using toothpaste to polish opals. We don't recommend this — while toothpaste contains talc (a mild abrasive), it's inconsistent in formulation and too easy to apply with too much pressure. A professional jewellery polishing cloth achieves the same result without risk.
Sudden temperature changes. Don't clean an opal in hot water immediately after bringing it in from cold outdoor air. The thermal expansion mismatch can cause internal stress fractures. Keep cleaning water lukewarm and close to room temperature.
Sleeping in opal rings. This isn't a cleaning issue, but it's the single most common cause of opal ring damage we see. Body weight pressing against a ring during sleep can crack or chip the stone, loosen settings, and bend prongs. Take rings off before bed.
Can Opals Get Wet?
This is the question that causes the most confusion, so let's be clear:
Solid Australian opals: yes. Water will not damage a solid opal. Most solid Australian opals contain 5% to 10% water naturally — they formed over millions of years in groundwater. Brief water exposure (washing hands, rain, light splashing) is completely fine. You just want to avoid prolonged extreme conditions — hours of soaking in hot water, for instance.
Doublets and triplets: avoid water. The opal itself isn't the problem — the adhesive bond between layers is. Water can seep into the bond over time and cause cloudiness or separation. Don't swim, shower, or do dishes while wearing doublet or triplet jewellery.
Ethiopian opals: special case. Most Ethiopian opals are hydrophane — they absorb water readily, which can temporarily change their appearance (they may go translucent or lose colour). While they typically return to normal once dry, repeated water absorption and evaporation can stress the stone. If you have Ethiopian opal jewellery, treat it like a doublet: keep it dry. For a comparison of Australian and Ethiopian opal properties, see our article on Ethiopian vs Australian opals.
How to Fix a Cloudy Opal
If your opal has gone cloudy, the cause determines the fix:
Surface scratches on a solid opal. Over years of wear, small scratches accumulate on the opal surface, scattering light and making the stone look dull or hazy. This is the most common cause of "cloudiness" in solid opal rings. The fix is professional repolishing — a lapidary or jeweller with opal experience can buff the surface back to a high polish, and the play-of-colour returns as if the stone were new. We've repolished opals that owners thought were permanently damaged, and they've come back looking as vivid as the day they were first set.
Water penetration in a doublet or triplet. If water has seeped between the layers, the trapped moisture creates a foggy, grey appearance. In mild cases, the stone may clear up on its own as the moisture slowly evaporates. In severe cases, the doublet may need to be disassembled and re-bonded by a lapidary — or, if the damage is too extensive, the opal slice may need to be replaced.
Dehydration crazing. If a solid opal has been stored in extremely dry conditions for a long time (such as a bank vault or a hot display case without humidity), it can develop a network of fine surface cracks called crazing. Once crazing occurs, it's generally permanent — the cracks can sometimes be polished out if they're very shallow, but deep crazing compromises the stone structurally. Prevention is far better than cure: store opals in a soft pouch or lined box, and for long-term storage, place the piece in a sealed plastic bag with a slightly damp piece of cotton wool to maintain ambient moisture.
How to Store Opal Jewellery
Proper storage is especially important for opal because it sits lower on the Mohs hardness scale (5.5 to 6.5) than many common gemstones. Diamonds (10), sapphires (9), and rubies (9) will all scratch opal on contact — even a diamond accent stone in the same ring box can damage an opal surface.
Store separately. Keep opal pieces in individual soft pouches or compartments within a lined jewellery box. Never toss opal in with harder stones.
Maintain humidity. For pieces worn regularly, ambient skin moisture during wear is enough to keep the opal hydrated. For pieces stored for months or longer, place them in a sealed bag with a small piece of damp cotton wool. This prevents dehydration and potential crazing in very dry environments.
Avoid extreme conditions. Don't store opals on windowsills (direct sunlight and heat), in bathrooms (steam and humidity swings), or in bank vaults (typically very dry air). A bedroom drawer or lined jewellery box at room temperature is ideal.
Annual check (if unworn). If an opal hasn't been worn for 12 months or more, soaking a solid opal in lukewarm water for 10 to 15 minutes can help maintain its moisture balance. This doesn't apply to doublets or triplets — for those, just ensure the storage environment isn't excessively dry.
What Can Scratch an Opal?
More than you'd think. At 5.5 to 6.5 on the Mohs scale, opal is softer than quartz (7) — and quartz is a major component of common household dust. That means even wiping a dusty opal with a dry cloth can leave micro-scratches.
Always clean before wiping — dampen the cloth first to lift particles rather than dragging them across the surface. And store opal pieces away from harder stones, metal chains, and rough-textured boxes.
For a deeper look at opal's physical properties and what they mean for everyday wear, see our opal hardness and Mohs scale guide.
When to Get Professional Help
Some situations go beyond what you can fix at home:
Visible cracks or chips. Surface cracks can sometimes be polished out. Deeper fractures may require resetting the stone or replacing it. Either way, a professional assessment is the right first step.
Loose settings. Hold your opal ring close to your ear and shake gently. If you can hear or feel the stone moving, the claws or bezel need tightening before the stone falls out and is lost. This is a quick, inexpensive repair at any jeweller.
Persistent cloudiness. If cleaning doesn't restore clarity, the issue may be internal — either water damage in a composite opal, or surface scratches too deep for home polishing. A lapidary can assess and repolish.
Inherited or antique opal jewellery. Before cleaning antique pieces, determine whether the opal is solid, doublet, or triplet. Older pieces often use doublet construction, and the adhesives used decades ago were less water-resistant than modern formulas. Clean cautiously until you know what you're working with.
We offer inspection, repolishing, and ring resizing services at our showroom in The Rocks — if your opal jewellery needs attention beyond a home clean, we can help.
Quick Reference: Opal Cleaning by Type
Solid Australian opal: Warm soapy water, soft brush, rinse, pat dry. Water is fine. Avoid ultrasonics, chemicals, and abrasives.
Doublet opal: Damp cloth with mild soap. Never submerge. Dry immediately. No ultrasonics.
Triplet opal: Same as doublet — damp cloth only. Avoid water on all bonded surfaces.
Ethiopian opal: Treat as a doublet — avoid water contact. Hydrophane structure absorbs moisture.
For more on whether opal is durable enough for daily wear, see our opal durability and everyday wear guide.
See Our Opal Collection
Every piece in our Australian opal collection comes with care guidance specific to its type — solid, doublet, or triplet — so you know exactly how to look after it from day one. Our team can also advise on the best setting types for your lifestyle and answer any care questions in person.
In Sydney? Visit us at C8/200 Cumberland Street, The Rocks — get directions.
Interstate? Browse our collection online or send us an enquiry. We ship nationally with full insurance.