How to clean and care for a marble, granite or wood urn

Marble: nothing acidic, ever

Marble is calcium carbonate, so anything acidic dissolves the surface on contact. Vinegar, lemon, most glass cleaners, bathroom sprays and many all-purpose cleaners will leave a dull etched patch that polishing can't fully undo.

Clean it with a soft dry microfibre cloth for dust, and for anything more, warm water with a drop of pH-neutral dish soap on a damp cloth, dried immediately afterwards. That is the entire routine.

• Never use: vinegar, lemon juice, bleach, ammonia, bathroom or glass cleaner, abrasive pads
• Do use: dry microfibre, warm water, a pH-neutral soap, a dry cloth to finish
• Blot spills at once — standing water can leave a ring on polished stone

Granite is tougher, but treat it the same

Granite resists acid far better than marble and won't etch from a splash of household cleaner. It can still be dulled by abrasives and by repeated use of harsh chemicals on the polish, so the same warm-water routine applies.

Both stones are natural, so colour and veining vary piece to piece — a variation is not a flaw, and it will not spread or change over time.

Wood urns: humidity is the enemy

Wood urns move with humidity. Keep them out of direct sunlight, away from radiators, fireplaces and exterior walls that get cold, and off windowsills where condensation collects.

Dust with a dry cloth. If the finish looks tired, a small amount of quality furniture polish on the cloth — never sprayed directly onto the urn — restores it. Avoid silicone-heavy sprays on engraved areas.

Engraving, seals and everyday handling

Clean engraved lettering with a dry soft-bristled brush; a damp cloth alone tends to skip over the recesses. Never pick at filled or painted lettering with anything metal.

Most threaded or gasketed lids do not need re-sealing for indoor display. If an urn is going into the ground, into a columbarium niche, or on a boat, a bead of clear silicone around the lid seam is the standard step — and it is reversible with a blade if you later need to open it.

Lift a stone urn from underneath with both hands, never by the lid. Place it towards the back of a shelf, on a level surface, away from doors that slam and out of reach of pets and toddlers.

Common questions

Can I use glass cleaner on a marble urn?

No. Most glass and all-purpose cleaners are acidic or ammonia-based and will etch marble permanently. Warm water with pH-neutral soap is the safe option.

Do I need to seal the urn?

Not for display at home. Seal the lid seam with clear silicone if the urn will be buried, placed in a niche, or transported by water or air.

How do I clean engraved lettering?

Use a dry soft toothbrush or a soft-bristled artist's brush to lift dust from the recesses, then wipe the flat surface with a barely damp cloth and dry it.

Can a stone urn be kept outdoors?

Polished marble will dull outdoors from rain and UV; granite handles weather far better. For a garden or a burial, choose granite or a purpose-built burial urn rather than a polished indoor piece.

Sources and further reading

• Natural Stone Institute — care and cleaning

  Industry guidance on cleaning marble and granite, including which cleaners cause etching.