Opal Care — How to Look After Your Australian Opal
Opal is one of nature's most beautiful gemstones, but it is softer than diamond or sapphire — about 5.5 to 6.5 on the Mohs scale, similar to glass. Treat it well and it will outlive you. Treat it badly and it can crack, dry out, or lose its shine. The good news is that "treating it well" really just means a few simple habits.
Storage
Store your opal separately from harder gemstones — diamonds, sapphires, rubies and even quartz can scratch the surface if they knock against it. A soft pouch, a lined jewellery box, or a dedicated compartment all work fine.
Solid opals contain a small amount of water in their structure. In very dry climates or air-conditioned environments, a long-term storage trick is to keep a small piece of damp cotton wool in the box (not touching the stone) — this maintains humidity. For most Australian homes this isn't necessary, but it's worth knowing for travel or long-term storage.
Cleaning
Day to day, all your opal needs is a soft, slightly damp cloth. Wipe gently. No detergents, no alcohol, no jewellery dips, no commercial cleaners.
If a piece needs more attention, a quick rinse under lukewarm water with a tiny bit of mild soap is fine — then pat dry with a soft cloth. Don't soak it. Don't scrub it.
What to avoid
- Ultrasonic cleaners — vibration can crack the stone or break the bezel setting. Never.
- Steam cleaners — sudden heat causes opal to crack. Never.
- Harsh chemicals — bleach, ammonia, chlorine, perfume, hairspray. Put your jewellery on last when getting ready, and take it off first when you get home.
- Sudden temperature changes — don't go from a hot car into cold water. Opal does not like thermal shock.
- Knocks and impacts — opal chips more easily than harder stones. Take it off before sport, gardening, or anything rough.
- Long water exposure — remove before swimming (especially chlorinated pools and salt water) and before showering.
For doublets and triplets
Doublets and triplets need extra care around water. The opal layer is bonded to a backing with adhesive, and prolonged water exposure can break that bond down over years. Wipe with a slightly damp cloth only — don't submerge. Otherwise the same rules apply.
If something goes wrong
If you scratch, chip, or crack a stone — get in touch. I can often re-cut, re-set, or repair pieces I've made. Don't try to polish it yourself or take it to a generalist jeweller; opal needs specialist hands.
Get in touch with the photos and the story, and I'll tell you what's possible.
The short version
Soft cloth. Soft pouch. No ultrasonics, no steam, no chemicals. Take it off for sport and swimming. Treat it like the natural stone it is, and it will be passed down through your family.