Which stones can I put in the ultrasonic, and which should I avoid?
We sort bead strands into three bins. Safer in ultrasonic: crystal and golden rutilated quartz, smoky and cognac quartz, and sapphire, assuming the strand is sound and free of major breaks. Amethyst is usually safe in ultrasonic, but it should never be steamed and it can fade in direct sun. Never ultrasonic tanzanite, emerald, Ethiopian Welo opal, turquoise, lapis lazuli or ruby.
Read the care notes in our stone guides for specifics: quartz varieties are fine in ultrasonic (crystal and rutilated quartz, smoky and cognac quartz); amethyst is usually safe in ultrasonic but no steam (amethyst); sapphire is fine in ultrasonic (sapphire). Skip ultrasonic for sensitive stones like tanzanite, emerald, Ethiopian Welo opal, turquoise, lapis lazuli and ruby.
- Any bead with obvious fractures or heavy inclusions at the drill hole belongs in the "do not ultrasonic" bin.
- Surface-reaching rutile in rutilated quartz can chip at drill holes, so inspect ends closely before cleaning.
Is steam cleaning ever safe on my bead strands?
We do not recommend steam on gemstone bead strands. High heat and sudden temperature change can crack or shock many colored stones, and pressurized steam is harsh on stringing too. Trade bench guides warn that steam can instantly damage even hard stones, so strands are a no-go here.
Tara here: we never steam any strung gemstones in our studio. Clean gently by hand with mild soap and water as our stone guides suggest, for example on amethyst and emerald.
What ultrasonic settings should I use?
Keep the bath cool. Turn tank heat off. Use mild dish soap in water per your unit manual. Run the unit at the lowest power in very short pulses, checking the strand between bursts.
Suspend the strand in a plastic or mesh basket so it does not touch the tank walls or floor. Coil loosely so beads are not grinding on each other. Rinse in clean water and dry flat on a towel, away from heat or sun.
Watch the thread. If you see fuzzing, color bleed, or any new chips at drill holes, stop immediately and switch to hand cleaning.
- Do not let the strand rest on bare metal in the tank.
- Keep solution changes frequent to avoid warm baths that creep up during long sessions.
Which bead shapes are safest to clean?
Compact shapes with thicker walls are tougher in mechanical cleaning. Smooth rounds, ovals and sturdy rondelles tolerate brief ultrasonic far better than long, thin or pointy cuts.
High-risk shapes concentrate stress at the hole and edges. Top-drilled pears, hearts, briolettes, diamond cuts and pyramids can chip at the point or along sharp facets in vibration.
Knotting adds space that helps beads avoid knocking each other. Knotting between beads adds about 1 mm per knot, which slightly lengthens a re-strung piece and buffers contact.
Will steam or ultrasonic hurt my stringing or findings?
Silk and nylon can fuzz, stretch or weaken with heat and agitation. Elastic is especially vulnerable. Adhesives at end tips or knots can soften. Clean loose beads before stringing when you can, or plan on re-stringing after any aggressive cleaning.
Metal findings can ding beads as the tank vibrates. Isolate pendants or heavy spacers from delicate stones, or clean components separately on wire-wrapped links rather than as a full strand.
How should I test a strand first?
Inspect under bright light. Look for cracks, cloudy zones, or surface-reaching features at the drill holes. If you see issues, do not ultrasonic or steam.
Test the least visible section first at the gentlest settings in a cool bath, then check for new edge chips or thread wear. For mixed-stone strands, follow the rule of the most sensitive stone and skip mechanical cleaning entirely.