Most care advice for crystals is either obvious or wrong. This is the short version that holds up: what damages stone, what does not, and where the common advice came from.
The three things that actually damage stone
Thermal shock. Moving a stone from a hot window to cold water can crack it along internal fractures. Quartz with visible veils is the most vulnerable.
Sunlight. Amethyst, rose quartz and several dyed materials fade under prolonged direct sun. A south-facing windowsill is the worst place for them and the most common place people put them.
Abrasion. Hard stones scratch soft ones. Storing quartz against jade, or a chain against a polished face, does damage slowly and invisibly.
What is usually fine
Dusting with a dry microfibre cloth handles most of it. Lukewarm water with a drop of mild soap is safe for quartz, jadeite and nephrite. Rinse and dry immediately rather than leaving pieces wet.
Skip water entirely if the piece is mounted: cord, brass, glued settings and plated finishes all suffer more from water than the stone does.
Methods that do not do anything
Salt water. It leaves residue in fractures and corrodes metal. It does not "cleanse" anything measurable.
Sunlight "charging". It fades colour. That is the only reliable effect.
Burying in soil or rice. Harmless, but it is storage, not maintenance. Rice dust gets into settings.
Freezing. Thermal shock, with no upside.
Silver, brass and cord
Silver tarnishes; polish with a soft silver cloth and store sealed. Brass darkens with air and leaves a mark on some skin; lacquered pieces should only be wiped. Cord should come off before swimming or showering, because water softens dye and stretches nylon.
What this article does not claim
It does not claim that any stone holds, transmits or needs to be cleared of energy, and it does not claim that any care ritual affects health or fortune. The guidance above is about physical condition only.
Scope. This essay is cultural and material commentary. It is not medical, financial or spiritual advice, and it makes no claims about the effects of any object.
