A. Chuan Journal — Care Guide
Agate, tiger's eye, lapis lazuli, amethyst and other polished natural stones only need a soft cloth and, occasionally, a little mild soapy water — never an ultrasonic cleaner, and never a long stretch in direct sunlight.
The stones themselves are hard-wearing, but the settings and finishes around them are not, so most of what goes wrong comes down to the wrong cleaning method rather than everyday wear. Here is what actually holds up, stone by stone.
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Reference
The routine that works for almost everything
For day-to-day wear, a soft, dry cloth after each wear removes the oils and residue that dull a stone's surface over time. When a piece needs more than that, warm water with a drop of mild dish soap and a very soft brush — an old, clean toothbrush works well — is enough for agate, tiger's eye, lapis lazuli and most other polished natural stones.
| Step | What to do | What to avoid |
|---|---|---|
| After wear | Wipe with a soft, dry cloth | Rubbing while stone is dusty |
| Deeper clean | Warm water, mild soap, soft brush | Ultrasonic or steam cleaners |
| Drying | Pat dry immediately, air-dry fully | Leaving stones wet or damp |
| Before applying | Perfume, lotion, hairspray first | Spraying directly onto jewelry |
The one rule that applies across every stone in this guide: perfume, lotion and hairspray go on before the jewelry, not after. Both the stone's surface and the metal setting hold up far longer when they aren't catching daily chemical residue.
The one to skip
Why ultrasonic cleaners are the wrong tool here
Ultrasonic cleaners are built for stones like diamond and sapphire, which tolerate the vibration and heat involved. Most natural, porous or fracture-prone stones — agate and tiger's eye included — are not rated for it, and jewelers generally recommend the plain water and soft brush method instead for anything outside that small list of hard, stable gems.
Tiger's eye carries an added caution: its quartz structure is sensitive to sudden temperature swings, so rinsing a stone that has been sitting in a warm car or in direct sun under cold water can cause it to crack. Let it reach room temperature first.
- Skip — ultrasonic and steam jewelry cleaners.
- Skip — cold water on a stone that's warm to the touch.
- Use instead — room-temperature water and a soft brush.
Stone by stone
Where amethyst and lapis need their own rule
Amethyst's purple comes from trace iron in the quartz, and that color can fade with months or years of continuous direct sunlight — so it's worth keeping amethyst pieces out of a sunny windowsill between wears, rather than displayed for the long term.
Lapis lazuli is softer and slightly more porous than agate or tiger's eye. Keep it away from soaking and household chemicals entirely; a dry cloth, and water only when genuinely needed, keeps its deep blue from dulling.
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Storing pieces so the color and surface hold
Store natural stone jewelry away from direct sunlight and heat — a drawer or a lined box does more for long-term color than any cleaning routine can undo. Keep each piece in its own soft pouch or a lined compartment; stones are harder than most metals but still mark each other and the surrounding jewelry if left loose in a pile.
We've covered pearls separately, since they need a gentler routine of their own — see how to clean pearl jewelry if a piece in your collection pairs stones with pearl.
Agate
Wipe after wear; soap and water occasionally.
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Lapis lazuli
Dry cloth first; avoid soaking and chemicals.
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Tiger's eye
Let it cool before rinsing; no sudden temperature change.
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Common questions
Can you clean natural stone jewelry in an ultrasonic cleaner?
Generally, no. Ultrasonic cleaners are considered safe mainly for a small group of very hard, stable gems like diamond and sapphire. Most natural stones, including agate and tiger's eye, are better cleaned by hand with warm water, mild soap and a soft brush.
Is it safe to get natural stone jewelry wet?
Brief contact with room-temperature water is fine for agate, tiger's eye and most polished natural stones. Avoid soaking, and let a stone cool to room temperature before rinsing it if it's been sitting somewhere warm — a sudden change in temperature is the real risk, not water itself.
Does sunlight fade natural stone jewelry?
Some stones can. Amethyst in particular can lose depth of color after months or years of continuous direct sunlight, since UV exposure slowly affects the iron that gives it its purple tone. Storing pieces away from a sunny windowsill between wears keeps the color truer for longer.
How is cleaning natural stone jewelry different from cleaning pearls?
Pearls are softer and more reactive to chemicals than agate, tiger's eye or lapis lazuli, so they need a gentler, wipe-only routine — see our separate pearl cleaning guide for that routine specifically.
Most natural stone jewelry rewards a light touch: a soft cloth after wear, warm soapy water when it's genuinely needed, and a spot out of direct sunlight for storage. Start with one piece from our natural stone jewelry collection and this routine will keep it looking the way it did on day one.
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