prEN ISO 24018
(Main)Jewellery and precious metals - Specifications for 1 kilogram gold bar (ISO 24018:2020)
Jewellery and precious metals - Specifications for 1 kilogram gold bar (ISO 24018:2020)
This document specifies the requirements, test methods, inspection, marking, packaging, transportation, storage, quality certificate and the order (or contract) information of one kilogram gold bars.
This document is applicable to one-kilogram cast gold bars produced for investment markets or industrial (jewellery, electronic) markets.
Schmuck und Edelmetalle - Vorgaben für 1 Kilogramm Goldbarren (ISO 24018:2020)
Joaillerie, bijouterie et métaux précieux - Spécifications pour les lingots d'or de 1 kilogramme (ISO 24018:2020)
Le présent document spécifie les exigences, les méthodes d'essai, le contrôle, le marquage, l'emballage, le transport, le stockage, le certificat de qualité ainsi que les informations de commande (ou de contrat) concernant les lingots d'or d'un kilogramme.
Le présent document s'applique aux lingots d'or coulés d'un kilogramme produits pour les marchés d'investissement ou industriels (bijouterie et joaillerie, électronique).
Nakit in plemenite kovine - Specifikacije za 1-kilogramsko zlato palico (ISO 24018:2020)
General Information
- Status
- Not Published
- Publication Date
- 09-Jan-2028
- Current Stage
- 4020 - Submission to enquiry - Enquiry
- Start Date
- 20-Nov-2025
- Due Date
- 13-Jul-2026
- Completion Date
- 20-Nov-2025
Overview
prEN ISO 24018 (ISO 24018:2020) defines standardized specifications for the 1 kilogram gold bar (gold kilobar). It covers requirements, test methods, inspection, marking, packaging, transportation, storage, the certificate of analysis and order/contract information for cast 1 kg gold bars produced for investment and industrial (jewellery, electronics) markets. The standard helps harmonize quality, reduce market rejection and support transparent trading of gold kilobars.
Key Topics and Technical Requirements
- Fineness (purity): Minimum fineness 995 ‰. Acceptable finenesses: 999,9 ‰; 999,5 ‰; 999 ‰; 995 ‰. Measurement methods include cupellation (ISO 11426) and ICP-OES difference method (ISO 15093). Rounding rules and significant-figure requirements are specified.
- Chemical composition: For 999,9 ‰ two impurity-level specifications exist. The standard lists element limits (Ag, Pd, As, Bi, Cu, Cr, Fe, Mg, Mn, Ni, Pb, Sb, Si, Sn) with mg/kg limits (e.g., Ag ≤ 50 mg/kg). All elements present must be quantified for fineness determination.
- Physical specification: Mass tolerance is 1,000.00 kg to 1,000.10 kg (no negative tolerance). Dimensions: Length 100–120 mm, Width 47–56 mm, Thickness 7–13 mm.
- Surface quality: Flat, smooth surfaces; small top-surface shrinkage acceptable; no cavities or significant layering. Internal defects may cause rejection based on ultrasonic or conductivity tests.
- Marking: Permanent markings only on the top surface using stamping, dot matrix or laser. Minimum marks: manufacturer name/logo, “gold” or “Au”, mass (kg or g), fineness (‰ or %), and unique serial number.
- Security feature: Optional on any side; if it adds mass, disclosure on the certificate is required. Must not compromise physical specs.
- Certificate of analysis: Mandatory with each bar; must include manufacturer, nature of metal, mass, fineness, serial number, manufacturing date, signature and ISO reference when applicable.
- Packaging: Recommendation to pack 25 × 1 kg bars per case; bars must be protected during transport and storage.
Applications and Users
- Investment houses, bullion dealers and exchanges seeking consistent 1 kilogram gold bar specifications.
- Jewellery and electronics manufacturers that require reliable feedstock with controlled impurity profiles.
- Assayers, refineries and logistics providers responsible for testing, marking, certifying and transporting kilobars.
- Regulators and market operators looking to reduce discrepancies between regional acceptance rules.
Related Standards
- ISO 11426 - Determination of gold in jewellery alloys (cupellation/fire assay)
- ISO 15093 - Determination of high-purity gold, platinum and palladium (ICP-OES difference method)
Keywords: ISO 24018, 1 kilogram gold bar, gold kilobar, fineness, certificate of analysis, gold bar specifications, jewellery, investment markets.
Frequently Asked Questions
prEN ISO 24018 is a draft published by the European Committee for Standardization (CEN). Its full title is "Jewellery and precious metals - Specifications for 1 kilogram gold bar (ISO 24018:2020)". This standard covers: This document specifies the requirements, test methods, inspection, marking, packaging, transportation, storage, quality certificate and the order (or contract) information of one kilogram gold bars. This document is applicable to one-kilogram cast gold bars produced for investment markets or industrial (jewellery, electronic) markets.
This document specifies the requirements, test methods, inspection, marking, packaging, transportation, storage, quality certificate and the order (or contract) information of one kilogram gold bars. This document is applicable to one-kilogram cast gold bars produced for investment markets or industrial (jewellery, electronic) markets.
prEN ISO 24018 is classified under the following ICS (International Classification for Standards) categories: 39.060 - Jewellery. The ICS classification helps identify the subject area and facilitates finding related standards.
You can purchase prEN ISO 24018 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2026
Nakit in plemenite kovine - Specifikacije za 1-kilogramsko zlato palico (ISO
24018:2020)
Jewellery and precious metals - Specifications for 1 kilogram gold bar (ISO 24018:2020)
Schmuck und Edelmetalle - Vorgaben für 1 Kilogramm Goldbarren (ISO 24018:2020)
Joaillerie, bijouterie et métaux précieux - Spécifications pour les lingots d'or de 1
kilogramme (ISO 24018:2020)
Ta slovenski standard je istoveten z: prEN ISO 24018
ICS:
39.060 Nakit Jewellery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 24018
First edition
2020-06
Jewellery and precious metals —
Specifications for 1 kilogram gold bar
Joaillerie, bijouterie et métaux précieux — Spécifications pour les
lingots d'or de 1 kilogramme
Reference number
ISO 24018:2020(E)
©
ISO 2020
ISO 24018:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2020 – All rights reserved
ISO 24018:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 1
4.1 Fineness . 1
4.2 Chemical composition . 2
4.3 Physical specification . 2
4.4 Surface quality . 3
4.5 Markings . 3
5 Security feature . 3
6 Certificate of analysis . 3
7 Packaging . 4
ISO 24018:2020(E)
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
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
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expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 174, Jewellery and precious metals.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
ISO 24018:2020(E)
Introduction
The 1 kilogram gold bar (also named gold kilobar) is the most manufactured and traded small gold
bar. As the premium associated with this product is generally very low, it is popular not only among
institutional and private investors,
...
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