Can Crystals Get Wet?

The Short Answer

Many crystals are water-safe. Some are not — and the consequences of getting it wrong range from cosmetic (surface dulling, colour fading) to structural (cracking, dissolving, rusting). The difference comes down to three factors: hardness, porosity, and chemistry. Understanding which category each stone falls into takes the guesswork out entirely.

Why Water Can Damage Crystals

Hardness is the most straightforward factor. The Mohs scale runs from 1 (talc, easily scratched by a fingernail) to 10 (diamond). As a general rule, stones with a Mohs hardness of 6 or above tolerate brief water contact safely. Below 5, water can penetrate the surface, cause delamination, or accelerate surface degradation.

Porosity matters independently of hardness. A porous stone — one with microscopic gaps in its structure — can absorb water even if it is relatively hard. Over time this can introduce micro-fractures, affect surface treatments, or in extreme cases compromise structural stability. Lapis lazuli is a well-known example: hard enough in principle, but composite and porous enough that prolonged soaking causes problems.

Chemistry is the third factor and the most decisive. Selenite is calcium sulphate — water literally dissolves it slowly. Hematite and pyrite are iron minerals — water causes them to oxidise and rust. No amount of hardness compensates for chemistry that is fundamentally incompatible with water.

Crystals That Are Safe to Rinse

The following crystals from our collection are water-safe for brief rinsing under cool running water. Prolonged soaking is not recommended for any of them, but a thorough rinse for cleansing purposes is perfectly fine.

Quartz family — all generally safe:

• Clear Quartz — water-safe and largely stable; brief rinsing or a soft damp cloth
• Amethyst — water-safe; avoid prolonged sunlight after rinsing as UV bleaches its colour
• Rose Quartz — water-safe; same sunlight caveat as amethyst
• Citrine — water-safe; heat-treated citrine is slightly more light-sensitive than natural citrine
• Smoky Quartz — water-safe for brief cleaning; avoid sustained UV exposure afterwards
• Green Aventurine — water-safe; avoid prolonged contact with acidic substances

Other safe stones:

• Black Tourmaline — water-safe; a gentle scrub with a soft brush is fine
• Aquamarine — water-safe; one of the more chemically stable stones in regular use
• Carnelian — water-safe; a rinse or damp cloth is sufficient
• Obsidian — water-safe for polished pieces; handle raw specimens with care as edges are sharp
• Tiger’s Eye — water-safe; a brief rinse under cool water is all it needs
• Rhodonite — water-safe for brief cleaning; avoid prolonged soaking

Safe for brief contact, avoid prolonged soaking:

• Labradorite — safe for brief rinsing; has cleavage planes that can weaken with extended exposure
• Moonstone — safe for brief cleaning; two cleavage directions mean extended soaking is not recommended
• Sodalite — safe for a gentle rinse; relatively soft at 5.5, so store away from harder stones
• Labradorite — safe briefly; avoid ultrasonic cleaners

Crystals That Should Not Get Wet

These stones should be kept dry entirely, or cleaned only with a dry or barely-damp cloth.

Selenite — This cannot be overstated: water dissolves selenite. Even brief soaking can etch the surface, dull the lustre, and weaken the structure. Clean only by dusting with a very soft dry brush. For energetic cleansing, use moonlight or proximity to other crystals. Selenite is self-cleansing and needs no water method.

Hematite — Iron oxide. Water causes it to continue oxidising — in plain terms, it will rust. Wipe only with a dry cloth or barely damp cloth, then dry immediately. Avoid salt baths entirely.

Pyrite — Also an iron mineral and subject to the same oxidation issue as hematite. Keep dry. Pyrite is beautiful but fragile in the presence of moisture.

Lepidolite — Hardness 2.5. Its layered mica structure can delaminate with prolonged water contact. Clean only with a dry or very slightly damp soft cloth. Never submerge.

Lapis Lazuli — Porous composite rock. Extended soaking can draw water into micro-fissures and affect surface stability. A brief, gentle wipe with a very slightly damp cloth is fine; do not soak or steam clean.

Malachite — Copper carbonate, mildly toxic when dissolved. Avoid water contact as a general rule, and never make crystal water or elixirs with malachite under any circumstances.

A Note on Crystal Water and Elixirs

If you use crystals to infuse drinking water — whether for ritual or wellness purposes — the distinction above becomes critical rather than merely practical. Malachite, selenite, pyrite, hematite, and lepidolite should never be placed directly in drinking water. For any elixir practice, the indirect method (placing the crystal beside or beneath a sealed glass vessel rather than inside it) is the safest approach regardless of which stone you are using.

The Simple Rule

When in doubt: if it is a quartz variety, it can almost certainly be rinsed briefly. If it is soft, metallic, layered, or porous, keep it dry and choose a different cleansing method — moonlight, selenite, smoke, or sound all work beautifully without a drop of water.

For a full overview of all available cleansing methods and when to use each, see the Crystal Clearing Ritual.