The short version: turquoise is porous — under magnification it looks more like a sponge than a crystal — so it absorbs oil, perfume and cleaning fluid permanently. Clean it with a barely damp soft cloth. Never use an ultrasonic cleaner, steam, or liquid silver dip.
Turquoise on oxidised silver is the signature of this region's jewellery, and it is the combination most likely to be destroyed by good intentions. The silver wants polishing; the stone cannot survive most of the things that polish silver.
Why turquoise is different
Most gemstones are dense and sealed. Turquoise is neither: it is comparatively soft and genuinely porous, which is why it takes such a deep colour and why that colour changes over a lifetime. It absorbs what it touches — hand cream, perfume, sunscreen, cooking oil, cleaning fluid — and once absorbed, it does not come back out.
Colour shift in an old stone is not necessarily damage. Turquoise that has greened over decades of wear has simply lived, and among collectors that patina is often prized. What cannot be undone is a stone that has drunk something.
What will destroy it
- Ultrasonic cleaners. Fine on sapphire, ruinous here. The vibration cracks porous stone and can strip the wax or resin stabilisation many turquoise pieces carry. Seconds, not minutes.
- Steam cleaners. Heat plus moisture, same outcome.
- Liquid silver dip. The fastest way to wreck a turquoise piece. It attacks the stone and its stabilisation, and strips the deliberate oxidation from the silver at the same time.
- Soaking. Even plain water, given time, moves into the stone and can loosen the setting adhesive.
- Perfume, hairspray, lotion, sunscreen. Put the piece on last, after everything else has dried.
How to actually clean it
- Wipe the stone with a soft, lint-free cloth, barely damp. That handles almost everything.
- For grime, add one drop of mild soap to lukewarm water, dampen the cloth, wipe, then go over it with a second cloth dampened in clean water. Never hold the piece under a tap.
- Pat dry and let it air-dry completely before storing. Trapped moisture behind a stone is a slow problem.
- For the silver, use a polishing cloth on the metal only, working around the setting without pressing on the stone. Fold the cloth to a point for tight areas.
IF THE SILVER IS BADLY TARNISHED
Resist the urge to reach for anything stronger. Tarnish sitting in the recesses of stamped or filigree work is part of how the pattern reads, and removing it flattens the piece. Where the silver genuinely needs more than a cloth, that is a job for a jeweller who can protect the stone — not a dip. The general approach is in why silver tarnishes and how to stop it.
Storing it
Turquoise and sterling want slightly different conditions, and the compromise is straightforward: a soft pouch of its own, kept somewhere dry and out of direct sun — prolonged sunlight can fade the stone. Silica gel is fine nearby but should not sit against the stone. Store it separately from other pieces; turquoise scratches more easily than most people expect.
Older pieces need more caution
Antique regional work is often set with adhesive that has aged, and stones that have already absorbed decades of oils. Wipe those with a dry cloth only, and take anything loose to someone who has handled old work before. A modern solder repair at the wrong temperature can destroy filigree that survived a century — and the same heat will crack the stone. The context for those pieces is in the field guide to Pashtun jewellery.
Common questions
Can I put turquoise jewellery in an ultrasonic cleaner?
No. Turquoise is porous and comparatively soft, and ultrasonic vibration can crack it or strip the wax stabilisation many turquoise pieces carry. The same applies to steam cleaners. Use a barely damp soft cloth instead.
Why has my turquoise changed colour?
Turquoise is porous and absorbs oils from skin, cosmetics and the air over time, which shifts blue stones towards green. On an older piece this is patina rather than damage, and it is often valued. It cannot be reversed, which is why prevention matters more than cleaning.
How do I clean silver around a turquoise stone?
Use a silver polishing cloth on the metal only, working around the setting without pressing on the stone. Never use liquid silver dip on a piece with turquoise in it — it damages the stone and strips the intentional darkening from the silver at once.
Can turquoise get wet?
Brief contact with a damp cloth is fine. Soaking, running water and hot water are not — the stone absorbs moisture and the setting adhesive can loosen. Take turquoise off before washing, swimming or cooking.