prEN ISO 9202

Jewellery and precious metals - Fineness of precious metal alloys (ISO/DIS 9202:2025)

This document specifies a range of fineness of precious metal alloys (excluding solders) 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.

Schmuck und Edelmetalle - Feingehalt von Edelmetalllegierungen (ISO/DIS 9202:2025)

Joaillerie, bijouterie et métaux précieux - Titre des alliages de métaux précieux (ISO/DIS 9202:2025)

Le présent document spécifie les titres des alliages de métaux précieux (à l'exception des soudures) d'usage recommandé en joaillerie.
NOTE Il peut exister des exigences légales nationales relatives à la désignation, au marquage et au poinçonnage des articles finis dans les pays en question.

Nakit in plemenite kovine - Čistine zlitin plemenitih kovin (ISO/DIS 9202:2025)

General Information

• Status: Not Published
• Publication Date: 16-Aug-2026
• ICS: 39.060 - Jewellery
• Technical Committee: CEN/SS M21 - Precious metals - Applications in jewellery and associated products
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 11-Apr-2025
• Completion Date: 11-Apr-2025
• Ref Project: oSIST prEN ISO 9202:2025 - Jewellery and precious metals - Fineness of precious metal alloys (ISO/DIS 9202:2025)

Relations

• Revises: EN ISO 9202:2019 - Jewellery and precious metals - Fineness of precious metal alloys (ISO 9202:2019)
• Effective Date: 06-Nov-2024

Overview

prEN ISO 9202 (ISO/DIS 9202:2025) defines recommended ranges of fineness for precious metal alloys used in jewellery. The standard covers commonly used minimum fineness values (expressed in parts per thousand, ‰) for gold, platinum, palladium and silver alloys - excluding solders - and specifies the analytical methods to determine compliance. This fourth edition updates normative references and adds gold 995 ‰. Note: national legal requirements for designation, marking and stamping of finished articles can differ.

Key Topics

• Scope and intent: Recommended minimum fineness values for precious metal alloys in the jewellery sector; fineness values are stated as minimums with no minus tolerance.
• Units and definition: Fineness = minimum content of the named precious metal in parts per thousand (‰) by weight of the alloy.
• Permitted fineness values (examples from the standard):
  • Gold: 333, 375, 417, 585, 750, 916, 990, 995, 999
  • Platinum: 850, 900, 950, 990, 999
  • Palladium: 500, 950, 990, 999
  • Silver: 800, 925, 958, 990, 999
• Analytical methods: The document references validated test methods to determine fineness, including gravimetry, cupellation (fire assay), potentiometry, ICP-OES and SPARK-OES. Specific normative references include ISO 11210, ISO 11426, ISO 11427, ISO 11490, ISO 11494, ISO 11495, ISO 13756, ISO 15093, ISO 15096 and ISO 18214.
• Conformity rule: The standard requires use of one of the listed analytical methods to verify fineness.

Applications

• Quality control and laboratory testing: Use the referenced ISO test methods to verify alloy composition and certify fineness.
• Hallmarking and marking policy: Provide a technical basis for alloy designation and markings, while respecting national hallmarking laws.
• Manufacturing and material selection: Guide jewellers and manufacturers in selecting alloys that meet market or customer fineness expectations.
• Trade and procurement: Standardized fineness values help buyers and suppliers agree on product specifications and reduce disputes.
• Regulatory compliance and certification bodies: Serve as a reference for assay offices and conformity assessment bodies when assessing jewellery fineness.

Related standards

Key normative references cited by ISO/DIS 9202:2025 include:

• ISO 11210, ISO 11426, ISO 11427, ISO 11490, ISO 11494, ISO 11495, ISO 13756, ISO 15093, ISO 15096, ISO 18214

This standard is especially relevant for jewellers, assay laboratories, hallmarking authorities, manufacturers and import/export compliance teams working with precious metal alloys.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2025
Nakit in plemenite kovine - Čistine zlitin plemenitih kovin (ISO/DIS 9202:2025)
Jewellery and precious metals - Fineness of precious metal alloys (ISO/DIS 9202:2025)
Joaillerie, bijouterie et métaux précieux - Titre des alliages de métaux précieux (ISO/DIS
9202:2025)
Ta slovenski standard je istoveten z: prEN ISO 9202
ICS:
39.060 Nakit Jewellery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 9202
ISO/TC 174
Jewellery and precious metals —
Secretariat: DIN
Fineness of precious metal alloys
Voting begins on:
Joaillerie, bijouterie et métaux précieux — Titre des alliages de
2025-01-17
métaux précieux
Voting terminates on:
ICS: 39.060 2025-04-11
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 9202:2025(en)
DRAFT
ISO/DIS 9202:2025(en)
International
Standard
ISO/DIS 9202
ISO/TC 174
Jewellery and precious metals —
Secretariat: DIN
Fineness of precious metal alloys
Voting begins on:
Joaillerie, bijouterie et métaux précieux — Titre des alliages de
métaux précieux
Voting terminates on:
ICS: 39.060
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 9202:2025(en)
ii
ISO/DIS 9202:2025(en)
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
ISO/DIS 9202:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and
...