Is Ammonia Bad for Your Jewelry? Why We Went Ammonia-Free in 2003

By Manolo Sanchez, founder of Sparklean.

The short answer

Ammonia is a strong alkaline degreaser, and on a bare, untreated diamond in solid gold it works — fast. It is also the most common reason customers have brought us pearls that lost their luster, eyeglasses with peeling anti-reflective coatings, and white-gold rings whose bright rhodium finish dulled years early. If a piece is anything other than untreated stone plus solid metal, ammonia is a gamble. That is why we formulated ammonia-free in 2003 and never went back.

What ammonia actually does to jewelry

Household ammonia solutions are strongly alkaline (around pH 11–12). That high alkalinity is what cuts grease — and what attacks anything delicate:

• Organic gems — pearl nacre, opal, coral and amber are porous and chemically vulnerable; ammonia etches the surface, which reads as permanent dullness.
• Treated and fracture-filled stones — many emeralds are oil- or resin-treated, and many “clarity enhanced” diamonds are fracture-filled; ammonia degrades the filler and the treatment.
• Anti-reflective lens coatings — the thin films on modern eyeglasses delaminate with repeated ammonia (or alcohol) exposure. We have watched customers strip premium lenses with glass cleaner.
• Plated and finished metals — rhodium plating on white gold and other thin finishes wear faster under repeated harsh chemistry.

Why we went ammonia-free in 2003

Sparklean started behind jewelry counters in Miami in 2003. The brief we set ourselves was simple: one formula a jeweler could hand to any customer without first asking what the stone was, whether it was treated, or what coating was on their glasses. The trade-off took longer chemistry: a pH-balanced, biodegradable, ammonia-free formula that still lifts body oils and film. Twenty-three years later that same formula holds a 4.89-star average across 381 verified reviews, and it is still made in the USA.

What is safe on what

How to clean safely instead

The routine we recommend for almost everything: spray with an ammonia-free, pH-balanced cleaner, let it sit 30 seconds, wipe with a soft lint-free cloth. For rings on the go, the fine-tip pen cleans the stone without overspray. For watch bracelets, use the soft-bristle brush — and read our honest comparison of ultrasonic vs. spray vs. cloth before buying any machine.

FAQ

Is Windex safe for cleaning diamond rings?

Glass cleaners typically contain ammonia plus solvents and surfactants. A bare diamond survives it; the setting finish, any treatment in the stone, and anything organic may not. We do not recommend it.

Does ammonia damage white gold?

Not the gold itself — the rhodium plating that gives white gold its bright finish. Repeated harsh chemistry accelerates plating wear, which is why white-gold rings cleaned aggressively go yellow-gray early.

What about rubbing alcohol?

Alcohol is gentler than ammonia on metal but is a known enemy of lens coatings and some stone treatments. For anything coated or treated, stay pH-balanced and ammonia-free.

Do you ship to Spain and the EU?

Yes — localized pricing across the EU, and our products are stocked in our three Barcelona locations.

Every Sparklean formula is biodegradable, ammonia-free and pH-balanced — made in the USA since 2003, with a 30-day satisfaction guarantee.