What is Argentium or tarnish-resistant silver, and how does it compare with 925?

925 sterling silver jewellery, set with lab grown diamonds and made in our own Shenzhen workshop.

Posted on October 24, 2026by test111

Talk · Materials & stone knowledge

QThe questionEditorial scenario written by the ZKZ team. Not a customer post.

A buyer sees "Argentium 935" on a silver ring listing and wonders what it is, whether it is better than ordinary sterling silver, and whether it can be called sterling at all.

ZKZ Editorial TeamMain answer · Product & gemmology desk

Argentium is a brand of tarnish-resistant silver alloy. It replaces part of the copper in sterling silver with germanium, and it is sold as Argentium 935 (at least 93.5% silver) and Argentium 960 (at least 96% silver). It tarnishes less than traditional 925 sterling, but it is not tarnish-proof, and it is a different product, so the listing should name it.

What it is

Fact The maker's fact file describes Argentium 935 as containing at least 93.5% silver and Argentium 960 at least 96% silver, with germanium replacing part of the copper in the alloy. Traditional sterling silver is 92.5% silver, with the balance usually copper.

Fact Argentium and the Rio Grande supplier guide explain that tarnish resistance comes from a germanium-rich oxide at the surface, that the alloy resists firescale during fabrication, and that it can be hardened by heat treatment.

Can it be called "sterling"?

Fact Under the FTC Jewelry Guides, "sterling" or "sterling silver" may be used only for a product that is at least 925/1,000 pure silver (16 CFR 23.5). Argentium 935 and 960 are above that fineness.

Uncertain Whether a seller may use "sterling" for Argentium depends on the market and on how it is described. Some markets and hallmarking offices have their own rules for alloy names and fineness marks, so the listing should state the fineness that is stamped, for example 935 or 960, and not leave it to the buyer to guess.

How it compares with 925 sterling

Tarnish. Argentium is tarnish-resistant, not tarnish-proof, according to the producer. Test results published by the producer cover sulfur, sweat and UV exposure.
Price. It is normally more expensive, because of the alloy and the extra processing.
Hardness and wear. It can be hardened by heat treatment, but it is still silver and will scratch and bend. We cannot say how it compares in your use without testing.
Repair and plating. Jewellers who are used to sterling may need to adjust their methods for Argentium, and plating or soldering practice may differ.

What to ask a seller

Which Argentium grade is it (935 or 960), and what is stamped on the piece?
Is it supplied by the licensed producer?
Is it plated, and if so, with what?
Who will repair or resize it?

It depends Argentium suits people who dislike polishing silver. If you want a repairable, widely available alloy, ordinary 925 is easier to service almost anywhere.

Sources

Fact = stated by the cited source. Our advice = editorial recommendation. Uncertain / it depends = limits of what can be said in general.

Other perspectives from the ZKZ team

COZKZ Editorial TeamDisclosure & compliance perspective

State the stamped fineness, not just the brand name. A buyer comparing "925" with "935" should be able to see exactly what is in each, and what the stamp says.

SEZKZ Editorial TeamSelection perspective

If your skin tarnishes silver quickly, Argentium can reduce the polishing. If you need a stone-set ring that will be resized often, ask about servicing before you choose it.

SOZKZ Editorial TeamSourcing & buying perspective

Ask a factory whether it works with Argentium, and for the alloy supplier's documentation. Not every workshop has the experience or the right materials.

Have a different question? Ask our team, or browse more answers in Talk.

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