Crystal Jewellery Care: Cleaning, Storage & Daily Wear

The phrase “crystal jewellery” covers everything from a Mohs-7 quartz strand to a Mohs-2.5 pearl, with hardness, porosity, and chemical sensitivity varying across two orders of magnitude. A single care routine cannot cover the whole category. What can is a short framework: identify the material, find its hardness and porosity, and pick the cleaning method accordingly.

This guide is structured around that framework. It starts with the Mohs scale because hardness is the single best predictor of how a stone tolerates contact and cleaning, then moves through cleaning methods by material, storage practices that prevent contact damage, daily wear behaviours that extend a piece’s life, and the small number of stones with quirks that need their own paragraph.

Mohs hardness: the single best predictor

The Mohs scale is a relative scratch-resistance rank from 1 (talc) to 10 (diamond). It is not linear — the gap between 9 (corundum) and 10 (diamond) is larger than the gap between 1 and 9 — but as a working order it predicts which stones scratch which. Anything below 5.5 is softer than ordinary window glass; below 4 is too soft for unprotected daily wear.

The single most useful piece of information you can carry is: quartz scratches anything below it. A quartz strand stored loose with malachite, calcite, opal, or pearl will damage the softer material within months.

Cleaning methods by material

The default cleaning method — warm water with a drop of mild dish soap, soft brush, microfibre cloth — works for most hard, non-porous stones. The exceptions matter.

Ultrasonic cleaners use high-frequency vibration to dislodge dirt. They work well on hard, solid, undeated stones; they crack opal, dehydrate pearl, fracture filled emeralds, and shake loose glued settings. The general rule: if a stone is porous, hydrated, fractured, fracture-filled, or glued, skip ultrasonic and use a damp cloth.

Storage: separate by hardness, separate by porosity

The biggest cause of visible damage to crystal jewellery is storage contact between hard and soft materials. The fix is also the simplest: separate compartments, soft pouches, or a tray with fabric dividers.

• One piece per pouch. The traditional jeweller’s solution; works for everything.
• Compartmented box with fabric dividers. Practical for daily-wear pieces.
• Hanging hooks for strands. Keeps long pieces from tangling and reduces bead-on-bead abrasion.
• Cool, dry, dark. UV fades amethyst, citrine, rose quartz, kunzite, and a handful of others over months to years. Humidity tarnishes silver and weakens elastic cord.
• Off the window sill. The combination of UV, daily temperature swings, and dust is the worst case.

Daily wear: small habits that extend a piece’s life

Most damage to jewellery happens during ordinary activity, not in storage. A short routine prevents most of it.

• Last on, first off. Put jewellery on after lotion, perfume, hairspray, and makeup; take it off before washing hands or face. This single habit prevents most porous-stone discolouration and most metal tarnish.
• Off for water-contact tasks. Showering, swimming, washing dishes, gardening. Soap residue dulls polish; chlorine corrodes silver; impact against pool ladders or garden tools chips beads.
• Off for sleep. Strands twist and tangle, elastic cord weakens under repeated nightlong compression, and clasps catch on bedding.
• Wipe at end of day. A quick microfibre pass removes skin oils before they accumulate.
• Inspect monthly. Check clasps, jump rings, elastic cord, and bead surface for chips or wear. Restring before a strand breaks, not after.

The quirks: stones that need their own paragraph

Opal

Opal contains 6–20% water by mass. Sudden dehydration — dry heat, direct sun, low-humidity travel — can craze the surface or crack the stone. Keep opal at room temperature, away from radiators and car dashboards. A drop of mineral oil on a soft cloth, used occasionally, slows water loss in dry climates.

Pearl

Pearls are organic: layered nacre over a bead or tissue nucleus. Skin acidity, perfume, hairspray, sunscreen, and chlorinated water all degrade the surface. Wipe pearls with a damp soft cloth after every wear, never soak them, and never use ultrasonic. Restring knotted pearls every two to three years; the silk cord stretches.

Turquoise and lapis

Both are porous and absorb whatever they touch — skin oils, hand cream, perfume. Turquoise can shift colour from oil absorption (sometimes intentional in older pieces; sometimes not). Wipe dry, never soak, and apply lotion before putting them on.

Selenite

Selenite is a gypsum mineral (Mohs 2) that dissolves slowly in water. Dust with a soft brush only; never wash. Avoid humid bathrooms for storage.

Amber and jet

Both are organic and soften in solvents. Acetone, alcohol, and many jewellery dips dissolve the surface. Wipe with a soft cloth and water only.

How BE. thinks about care

BE.’s Crystal 4T framework grades a strand at selection. After it leaves the studio, care is the wearer’s. The instruction we send with every strand is short: rinse occasionally with warm water and mild soap, store separately, keep out of direct sun, and inspect the cord at least once a season. That is enough for a quartz strand to outlast many cycles of trend jewellery.

References

• GIA — Gem encyclopaedia
• Mindat — Mohs hardness scale
• Wikipedia — Mohs scale
• GIA — Jewellery care guide
• Webster, R. (2002). Gems: Their Sources, Descriptions and Identification, 5th ed. Butterworth-Heinemann.
• Schumann, W. (2009). Gemstones of the World, 4th ed. Sterling.