ISO 9202:2026

• Abstract:

  This document specifies a range of fineness of precious metal alloys recommended for use in the field of jewellery. NOTE There is a possibility that national legal requirements for the designation, marking and stamping of finished articles exist in the respective countries.

• Status: Published
• Publication Date: 19-May-2026
• ICS: 39.060 - Jewellery
• Technical Committee: ISO/TC 174 - Jewellery and precious metals
• Current Stage: 6060 - International Standard published
• Start Date: 20-May-2026
• Due Date: 04-Nov-2026
• Completion Date: 20-May-2026

• Consolidates: EN ISO 9202:2026 - Jewellery and precious metals - Fineness of precious metal alloys (ISO 9202:2026)
• Effective Date: 12-Feb-2026
• Consolidates: ISO 16147:2020 - Small craft — Inboard diesel engines — Engine-mounted fuel, oil and electrical components
• Effective Date: 07-Jan-2025
• Revises: ISO 9202:2019 - Jewellery and precious metals — Fineness of precious metal alloys
• Effective Date: 07-Jan-2025

ISO 9202:2026 is an International Standard from ISO for jewellery and precious metal alloys. It specifies recommended fineness ranges for precious metal alloys used in jewellery and links those ranges to analytical methods for checking fineness. The document is aimed at people who need to specify, test, or verify precious metal content in jewellery alloys.

What does ISO 9202:2026 specify?

ISO 9202:2026 specifies a range of fineness of precious metal alloys recommended for use in jewellery. It also notes that national legal requirements may apply to the designation, marking, and stamping of finished articles.

The document is organized into five clauses:

• Scope
• Normative references
• Terms and definitions
• Analytical methods for determining fineness
• Range of fineness

Clause 4 tells users which test methods are acceptable for determining fineness. Clause 5 gives the fineness ranges and the metal-specific recommended methods.

What are the key requirements of ISO 9202:2026?

ISO 9202:2026 centers on two practical requirements: use an accepted analytical method, and treat fineness as a minimum value with no minus tolerance. In practice, that means the alloy must meet or exceed the stated fineness.

Analytical methods

Clause 4 requires one of the listed test methods to determine fineness. These include ISO 11210, ISO 11426, ISO 11427, ISO 11490, ISO 11494, ISO 11495, ISO 13756, ISO 15093, ISO 15096 and ISO 18214. This matters because the method used can affect how the result is obtained and documented.

Fineness values

Clause 5 states fineness in parts per thousand (‰) by mass. The fineness is given as a minimum value, so a result below the stated level is not acceptable for the specified alloy designation.

Metal-specific ranges

Table 1 links the precious metal to recommended methods and the fineness levels used in jewellery:

• gold includes 585 ‰ and 995 ‰, with ISO 11426 among the recommended methods
• platinum includes 900 ‰, 950 ‰ and 999 ‰, with ISO 11210, ISO 11494, ISO 15093 and ISO 18214 used for the relevant cases
• palladium includes 999 ‰, with ISO 11490, ISO 11495, ISO 15093 and ISO 18214 used for the relevant cases
• silver includes 925 ‰, 958 ‰ and 999 ‰, with ISO 11427, ISO 13756, ISO 15096 and ISO 18214 used for the relevant cases

For users, this table is the bridge between assay results and the fineness designation used for jewellery alloys.

What terms does ISO 9202:2026 define?

ISO 9202:2026 uses the vocabulary of ISO 19376-1 and defines one additional term in Clause 3.

• fineness - the content of the named metal expressed as parts per thousand (‰) by mass.
• parts per thousand (‰) by mass - the unit used in this standard to state the metal content of the alloy.
• ICP-OES - inductively coupled plasma optical emission spectrometry, used in several referenced methods for determining precious metal content.
• SPARK-OES - spark optical emission spectrometry, used for high-purity precious metal determinations.
• cupellation method (fire assay) - the ISO 11426 method referenced for gold determination.
• potentiometry - an electroanalytical measurement approach used in the referenced silver determination methods.
• gravimetry - a mass-based analytical approach used in the referenced platinum and palladium methods.

Who uses ISO 9202:2026?

ISO 9202:2026 is used by jewellery manufacturers, precious metal suppliers, assay and testing laboratories, quality managers, and buyers who need to specify or verify alloy fineness. It is also relevant to organizations involved in designation, marking, and stamping where national legal rules apply.

In practice, these users need the standard to choose an accepted test method, interpret assay results, and align alloy fineness with the jewellery market’s usual precious metal designations.

What changed in ISO 9202:2026 from the previous edition?

ISO 9202:2026 is the fourth edition and cancels and replaces ISO 9202:2019. The document states that it was technically revised.

The changes listed are:

• updated normative references
• addition of gold 995 ‰

Which standards are used with ISO 9202:2026?

ISO 9202:2026 cites several companion standards for determining fineness and for vocabulary.

• ISO 11210 - platinum determination by gravimetry using ammonium chloride
• ISO 11426 - gold determination by cupellation method (fire assay)
• ISO 11427 - silver determination by potentiometry using potassium bromide
• ISO 11490 - palladium determination by gravimetry using dimethylglyoxime
• ISO 11494 - platinum in platinum alloys by ICP-OES using an internal standard element
• ISO 11495 - palladium in palladium alloys by ICP-OES using an internal standard element
• ISO 13756 - silver determination by potentiometry using sodium chloride or potassium chloride
• ISO 15093 - high purity gold, platinum and palladium by difference method using ICP-OES
• ISO 15096 - high purity silver by difference method using ICP-OES
• ISO 18214 - high purity gold, silver, platinum and palladium by difference method using SPARK-OES
• ISO 19376-1 - vocabulary for precious metals and units

What does the ISO 9202:2026 document contain?

ISO 9202:2026 is a short, practice-focused standard. It contains a scope, a list of normative references, one defined term, a clause on analytical methods, and a table of fineness ranges for gold, platinum, palladium and silver.

The key technical content is in Clause 4 and Table 1: these show which analytical methods are acceptable and how those methods relate to the fineness levels used for jewellery alloys. For testing and certification work, that table is the main reference point.

International
Standard
ISO 9202
Fourth edition
Jewellery and precious metals —
2026-05
Fineness of precious metal alloys
Joaillerie, bijouterie et métaux précieux — Titre des alliages de
métaux précieux
Reference number
© ISO 2026
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ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Analytical methods for determining fineness . 2
5 Range of fineness . 2

iii
Foreword
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Norme
internationale
ISO 9202
Quatrième édition
Joaillerie, bijouterie et métaux
2026-05
précieux — Titre des alliages de
métaux précieux
Jewellery and precious metals — Fineness of precious metal
alloys
Numéro de référence
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2026
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
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Publié en Suisse
ii
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Méthodes d’analyse pour déterminer le titre . 2
5 Gamme de titre . 2

iii
Avant-propos
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