The method that works for almost everything
Warm water, a few drops of ordinary dish soap, and a soft toothbrush. Soak the piece for ten to fifteen minutes, brush gently around and behind the stones, rinse in clean warm water, and dry with a lint-free cloth. That is the whole routine, and it handles the film of skin oil, hand cream and soap residue that dulls a diamond long before anything else does.
Most people assume a diamond has lost its sparkle when it has only lost its cleanliness. Diamond attracts grease. A thin layer of it across the underside of the stone stops light entering, and the stone reads flat.
Why the underside matters most
Light enters a diamond through the top, reflects off the angled facets underneath, and returns to your eye. If the pavilion — the pointed lower half — is coated in oil, that reflection never happens. Cleaning the top of a stone and leaving the back is the most common mistake, and it is why a quick wipe rarely restores brilliance.
On a ring, brush from underneath, behind the setting. On a tennis bracelet, lay it flat and work along the line so the brush reaches between the stones.
How often
Every two weeks for a piece worn daily, such as an engagement ring. Monthly for anything worn occasionally. It takes about five minutes, and it is the difference between a diamond that looks bought yesterday and one that looks tired.
What to avoid
Chlorine bleach and household cleaners. These do not harm the diamond, but they attack alloys in gold, and over time can weaken the prongs holding your stone.
Toothpaste and baking soda. Both are abrasive enough to scratch a polished gold surface.
Hot water on a piece straight from cold, and sudden temperature changes generally.
Ultrasonic cleaners, unless you know how the piece is constructed. They are effective on a solid four-prong setting and risky on anything with tension-set or loosening stones — the vibration that lifts dirt can also shift a stone that was already insecure.
When to take it to a jeweler instead
If a stone moves, clicks or rattles when you tap the piece gently, stop cleaning it and have the setting checked. A loose stone lost down a drain during cleaning is the most avoidable way to lose a diamond.
The same applies if a prong catches on fabric. That is a prong that has lifted, and it will not fix itself. Normal wear of this kind is not covered by a manufacturing warranty, so an occasional check-up is worth planning for — see our lifetime manufacturing warranty for what is and is not included.
Does any of this differ for lab grown diamonds?
No. A lab grown diamond is chemically and physically the same material as a mined one — pure crystallized carbon, 10 on the Mohs scale — so it cleans the same way and is equally resistant to scratching. It will not cloud or fade with age either, whatever cleaning routine you use. If a stone has gone permanently dull despite proper cleaning, that is a sign it was never a diamond. See are lab grown diamonds real diamonds? for how the materials differ.
Storage
Separately, and soft-lined. Diamond scratches diamond — it is the only thing that can — so a bag of loose jewelry grinds against itself every time it moves. A pouch each, or a lined box with compartments, costs almost nothing and prevents the one kind of damage a diamond is actually vulnerable to.
Common questions
How do I clean a diamond ring at home?
Soak it for ten to fifteen minutes in warm water with a few drops of dish soap, brush gently with a soft toothbrush including underneath the stone, rinse and dry with a lint-free cloth.
Can I use toothpaste to clean diamond jewelry?
No. Toothpaste is mildly abrasive and will scratch polished gold, though it will not damage the diamond itself.
Are ultrasonic cleaners safe for diamond jewelry?
They are effective on secure prong settings, but the vibration can dislodge a stone that is already loose. If anything moves or rattles, have the setting checked first.
How often should I clean my engagement ring?
Every couple of weeks if you wear it daily. Skin oil and hand cream build up on the underside of the stone and dull it faster than anything else.
Do lab grown diamonds need different care from natural diamonds?
No. They are the same material with the same hardness, so the cleaning routine and the precautions are identical.