Why Your Diamond Stops Sparkling?
A lab grown diamond is the hardest material you wear, but it is also a magnet for skin oils, hand cream, soap residue, and kitchen grease. Within 6 weeks of daily wear, a thin film coats the pavilion (the underside of the stone), and that is exactly where light enters and reflects. The stone has not changed. The film is blocking the sparkle. Clean the film off, and the brilliance returns instantly.
We see this every week at our Kolkata and Delhi showrooms, clients come in worried their diamonds that has "gone dull" and walk out ten minutes later convinced we swapped the stone. We didn't. We just cleaned it properly.
This guide is the exact method our master jewellers use, Written so you can do it at home.
What you need? (₹150 total, all from any supermarket)
· A small ceramic or glass bowl (never metal, it can scratch settings).
· Warm water (not boiling, around 40°C).
· 2 drops of mild dish soap (any unscented dish liquid).
· A soft-bristle baby toothbrush, brand new and kept only for this.
· A lint-free microfibre cloth or a clean cotton handkerchief.
· A small kitchen strainer (the safety net for the drain).
The 5-minute method
1. Plug the sink or use the strainer. Always. One slip and your lab grown diamond is in the city sewage.
2. Fill the bowl with warm water and add two drops of dish soap. Swirl gently.
3. Soak for 10 minutes. This loosens oil and product residue. For heavy buildup, soak for 20 minutes.
4. Brush gently behind the stone. The pavilion and the prong gaps are where dirt sits. Use small circular strokes. Do not scrub the metal hard.
5. Rinse under a slow stream of warm water, holding the piece over the strainer.
6. Pat dry with the microfibre cloth. Do not rub. Let it air-dry for two minutes before putting it back on.
Do this every 6 weeks for daily-wear rings, monthly for earrings, and any time the lab grown diamond looks cloudy.
What to never do.
· No toothpaste. It contains abrasives that scratch gold and platinum settings.
· No bleach, chlorine, or ammonia. They corrode the alloys in 18k gold and can pit the prongs holding your lab grown diamond.
· No boiling water. Sudden temperature changes can crack older repairs or loosen glue in certain settings (rare, but real).
· No ultrasonic cleaner at home unless your jeweller has confirmed the piece is safe. Ultrasonic cleaning is excellent for clean prong settings on lab grown diamonds, but it can shake loose pavé melee diamonds, damage fracture-filled stones (rare in lab grown but check), and destroy emeralds, opals, pearls, and turquoise if your piece has any of those.
· No steam cleaner for the same reasons.
When to bring it to a jeweller instead
Home cleaning handles 90% of dullness. Bring your lab grown diamond piece to the showroom every 12 months for:
· Ultrasonic and steam cleaning (3 minutes, free for clients)
· Prong tightness check (a loose prong is how stones go missing)
· Rhodium re-plating on white gold (every 18–24 months for daily-wear rings)
· Re-polish of the metal if there are visible scratches
At Goenka Jewellers, every piece we have ever sold comes back for free lifetime cleaning and prong checks at our Kolkata and Delhi showrooms. Just walk in.
Quick troubleshooting
· Still cloudy after cleaning? The pavilion may have hand cream baked in. Soak for 30 minutes, repeat.
· A prong feels sharp or catches on fabric? Stop wearing it and bring it in, that is a bent prong and the stone is at risk.
· Yellow tint appearing? On white gold, this is rhodium wear, not the diamond changing colour. Re-plating fixes it instantly.
· A small chip on the girdle? Possible even on a diamond if it hit a hard surface at the wrong angle. Bring it in most chips can be re-polished with minimal carat weight loss.
FAQ
Q: How often should I clean my lab grown diamond ring?
A: Every 6-8 weeks for daily-wear rings, monthly for earrings and pendants. A 10-minute soak in warm soapy water restores the sparkle.
Q: Can I use toothpaste to clean a lab grown diamond?
A: No. Toothpaste contains abrasives that scratch gold and platinum. Mild dish soap and warm water is the only safe home method.
Q: Is it safe to use an ultrasonic cleaner on lab grown diamonds?
A: Yes for a clean lab grown diamond in a sturdy prong setting. Avoid ultrasonic for pavé settings, fracture-filled stones, and pieces with emeralds, opals, pearls, or turquoise.
Q: Why does my lab grown diamond look cloudy?
A: Almost always a film of skin oil, hand cream, or soap residue on the pavilion. Clean it, the brilliance returns instantly. The stone itself does not cloud.
Q: Will dish soap damage gold or platinum?
A: No. Mild, unscented dish soap is safe on 18k gold, 22k gold, and platinum. Avoid scented or antibacterial soaps with added chemicals.
Q: Can I clean my lab grown diamond engagement ring while wearing it?
A: Not properly. Always remove the ring, you need to brush behind the stone where dirt collects, and that is impossible while it is on your finger.
Internal links
· /journal/are-lab-grown-diamonds-real
· /journal/resale-value-of-lab-grown-diamonds-india
· /stores