Caring for Each Stone: A Practical Guide

Warm water, a drop of plain dish soap and a soft toothbrush handles moissanite, cubic zirconia and lab-grown diamond alike — brush behind the stone, where oil collects. Go lighter on cubic zirconia, which is soft enough to wear from scrubbing. Never use abrasives, and keep chlorine and bleach away from every piece: they attack the metal, not the stone.

Most jewellery care advice is either too vague to act on or written for materials you don't own. What follows is specific to the three stones and two metals in this collection.

The routine that covers everything

Fill a bowl with warm — not hot — water and add a single drop of plain washing-up liquid. Soak the piece for ten minutes. Brush gently with a soft toothbrush, paying attention to the back of the setting rather than the top of the stone, because that is where the film that dulls brilliance actually accumulates. Rinse under running water, holding the piece over a closed drain. Dry with a lint-free cloth.

Every few weeks for something worn daily, every few months for something occasional.

Per stone

Moissanite is chemically inert and needs nothing beyond the routine above. It tolerates ultrasonic cleaners well, though whether the setting does is a separate question — a piece with many small pave stones is safer cleaned by hand.

Cubic zirconia benefits from a lighter touch. It is soft enough that repeated brushing with anything firmer than a soft toothbrush will contribute to the surface wear that eventually dulls it. Clean it, but don't scrub it, and don't leave it soaking for long periods if it is set in plated metal.

Lab-grown diamond is a diamond and is effectively indestructible in domestic use. The only real caution is that diamond attracts grease unusually strongly, so it films over faster than you'd expect and benefits from more frequent cleaning, not less.

Per metal

Sterling silver tarnishes. This is a surface reaction with sulphur compounds in the air, not corrosion, and it lifts off with a proper jewellery polishing cloth. Store silver in a closed pouch or box when you aren't wearing it — air exposure is what drives the reaction, so a piece worn regularly tarnishes less than one left out on a dish.

Gold-plated sterling silver needs the opposite instinct: do not polish it. A polishing cloth removes tarnish by removing a microscopic layer of surface metal, and on a plated piece that surface metal is the plating. Clean plated pieces with soapy water and a soft cloth only. Put them on after perfume, lotion and hairspray, and take them off before washing your hands, swimming or the gym. Plating is a consumable layer; every one of those habits buys it more time.

What actually damages jewellery

Storage

Pieces stored loose together scratch each other — the hard stones do the damage and the metal takes it. Individual pouches or a divided box solve this entirely and cost almost nothing. Somewhere cool, dry and dark is better than a bathroom shelf, where humidity accelerates tarnish.