Cadmium-free tooth gems: why it's essential for your health

Cadmium, classified as a 1B carcinogen by the ECHA, is banned above 0.01% in jewelry in the EU. Yet generic tooth gems still contain it. At ISIS n GOLD, our Swarovski crystals are cadmium-free by design — and always have been.

Why is cadmium in tooth gems dangerous?

Cadmium (Cd) is an extremely toxic heavy metal. According to the IARC (WHO), it is classified as a Group 1 carcinogen by inhalation, and category 1B by oral exposure under the European CLP regulation.

In the mouth, a tooth gem is in permanent contact with saliva, an acidic medium (pH 6.2–7.4) that can cause leaching — the gradual release of heavy metals contained in the crystal. A study published on PubMed (PMID 22578526) shows that chronic oral exposure to cadmium causes kidney damage, bone demineralization, and liver disorders.

A tooth gem stays in the mouth for 6 months to 2 years. Over that period, even tiny traces of cadmium accumulate in the body, because cadmium has a biological half-life of 10 to 30 years according to the WHO. In other words, your body barely eliminates it.

What does European regulation say about cadmium in jewelry?

The European Union has taken a firm stance. EU Regulation 494/2011 amends Annex XVII of the REACH regulation (EC 1907/2006) to ban cadmium in jewelry at concentrations above 0.01% by metal weight. This limit applies to all jewelry sold in the European Economic Area, including tooth gems.

The REACH regulation also requires manufacturers to provide safety data sheets (SDS). A legitimate seller must be able to produce them on request.

The problem? Marketplaces like Amazon and AliExpress don't systematically verify REACH compliance of tooth gems sold by third parties. Our experience shows that many "no-name" rhinestone lots imported from China have no traceable certification.

Swarovski vs Preciosa vs generics: what's the difference when it comes to cadmium?

Not all crystals are equal. Here's a factual comparison of the three most common tooth gem sources on the market:

Key point: Swarovski never needed to announce a "cadmium-free formula" because cadmium has never been part of its composition. It's a selling point for other brands, but at Swarovski, it's simply been the standard from the start.

How can you verify that your tooth gems are truly cadmium-free?

Don't rely on "cadmium-free" claims without proof. Here's how to verify yourself:

At ISIS n GOLD, our customers systematically receive Swarovski crystals with verifiable product reference and REACH compliance on request by email. We sell no generics, no imitations.

What are the symptoms of oral cadmium exposure?

Chronic oral exposure to cadmium (even at low doses) can cause, according to a systematic review published on PubMed (PMID 30472720):

• Nephrotoxicity: damage to kidney tubules, proteinuria
• Bone demineralization: increased fracture risk ("itai-itai" disease historically documented in Japan)
• Liver disorders: long-term liver inflammation
• Endocrine disruption: cadmium is a recognized endocrine disruptor
• Local oral irritation: gum inflammation on direct contact

Our experience of more than 5 years in the tooth jewelry industry has convinced us: even micrograms accumulated over months represent a real risk. That's why we work only with Swarovski and 18K gold.

Why has Swarovski always been cadmium-free?

The absence of cadmium at Swarovski is not a recent innovation. The manufacturing process originally relied on lead glass (pre-2012) and then lead-free crystal (Advanced Crystal), but cadmium has never been used as a component.

Some brands communicate about their "new cadmium-free ranges", which implies that their older ranges contained it. At ISIS n GOLD, safety is not a marketing argument, it's a prerequisite. Our professional clients trust us because they know exactly what they're placing in their customers' mouths.

Who is allowed to apply a tooth gem?

In most European countries, applying a tooth gem is considered a cosmetic procedure. It should be performed in a suitable setting and the technician should have followed a professional training program that covers protocol and hygiene rules.

Certified training programs teach the technique, but application with composite and UV lamp should always take place in a compliant professional setting.

How does ISIS n GOLD guarantee safe tooth gems?

Our commitment rests on four concrete pillars:

1. 100% authentic Swarovski: every crystal is referenced (2058/2088 Flat Back range), verifiable with the manufacturer
2. Certified 18K gold: biocompatible, nickel-free
3. Documented REACH compliance: we provide compliance declarations on request
4. No generics: zero untraceable products in our catalog

Discover our complete Swarovski tooth gem collection: over 50 references in clear crystal, colors, and special effects (Aurora Borealis, Shimmer), all certified cadmium-free, lead-free, and nickel-free.

Frequently asked questions about tooth gems and cadmium

Do Swarovski tooth gems contain cadmium?

No. Swarovski crystals have never contained cadmium in their composition. Unlike other brands that had to reformulate their products, Swarovski uses a manufacturing process that has excluded cadmium from the start. All crystals sold by ISIS n GOLD comply with the REACH regulation.

How do I know if my tooth gems contain cadmium?

Ask the seller for the REACH compliance declaration and the certificate of origin. Check that the product reference matches an identified manufacturer (Swarovski, Preciosa). If the seller can't provide any documentation, don't use the product in the mouth.

Is cadmium in a piece of jewelry worn in the mouth really dangerous?

Yes. Saliva, an acidic medium, causes slow leaching of heavy metals. Cadmium accumulates in the body with a half-life of 10 to 30 years (WHO). Even tiny doses over several months can affect the kidneys and bones.

What's the difference between Swarovski and Preciosa for tooth gems?

Both brands produce quality crystals, but Swarovski has always been cadmium-free, while Preciosa introduced its "cadmium-free" ranges more recently. To learn more about materials, read our article Which material should you choose for your tooth gem?

Are generic tooth gems dangerous?

Potentially, yes. Without REACH certification or traceability, it's impossible to guarantee the absence of cadmium, lead, or nickel. Our guide How to spot fake Swarovski helps you identify imitations.

Can a dentist verify the composition of a tooth gem?

A dentist can demand compliance documents from the supplier, but can't chemically analyze a crystal in the practice. That's why supplier choice is decisive: buy only from resellers who provide REACH documentation.

This article is part of our Complete Guide to Tooth Gems 2026. Also check out our general FAQ for all your questions.