On 16 June 2021, the Government of India made hallmarking of gold jewellery and artefacts compulsory under the Bureau of Indian Standards (BIS) Act, 2016, marking the most significant structural reform in the country's gold trade in decades. The mandate, initially applied across 256 designated districts, requires every piece of gold jewellery offered for sale to bear a BIS hallmark certifying its fineness, along with a six-digit alphanumeric Hallmark Unique Identification (HUID) code that enables end-to-end traceability from assay centre to consumer. For a market that absorbs roughly 700–800 tonnes of gold jewellery annually and where under-carating had long been a documented consumer grievance, the regulation represented a decisive intervention in standards enforcement.

Background and Regulatory Framework

India's relationship with gold hallmarking predates the 2021 mandate. The BIS had operated a voluntary hallmarking scheme since 2000, establishing a network of accredited Assay and Hallmarking Centres (AHCs) and defining the visual grammar of the Indian hallmark: the BIS logo, the fineness mark, the AHC's identification mark, and the jeweller's own mark. Participation, however, remained optional, and surveys conducted by consumer bodies consistently found a significant proportion of jewellery in the retail market falling short of its stated purity. The World Gold Council and domestic industry associations had for years advocated for a mandatory framework, citing the precedents set by hallmarking regimes in the United Kingdom, European Union member states, and the Gulf Cooperation Council countries.

The legal basis for compulsion was provided by the BIS Act, 2016, which empowered the central government to notify categories of goods for which BIS certification would be mandatory. Gold jewellery and gold artefacts were formally notified under this provision, with the operative date set at 16 June 2021 following a period of consultation and a pandemic-related deferral from an earlier target date.

Permitted Caratages and Fineness Marks

The mandatory scheme recognises three caratages for gold jewellery sold in the Indian domestic market:

• 22 carat — fineness 916 (91.6 per cent gold by mass), the dominant standard for traditional Indian bridal and ceremonial jewellery.
• 18 carat — fineness 750, widely used in contemporary and gem-set jewellery.
• 14 carat — fineness 585, a smaller segment catering to export-oriented and fashion jewellery.

Higher caratages — 20 carat (fineness 833) and 23 carat (fineness 958) — were subsequently added to the permitted list as the scheme matured, reflecting the diversity of regional traditions across India's vast jewellery geography. Jewellery of caratages not listed in the BIS schedule may not legally be sold in covered districts.

The HUID System

The most technically innovative element of the 2021 reform is the Hallmark Unique Identification number. Each piece of jewellery submitted to an AHC is assigned a unique six-character alphanumeric code, laser-engraved or stamped onto the article alongside the standard hallmark components. The HUID is registered in a centralised BIS database, recording the assay centre, the date of hallmarking, the caratage, and the registered jeweller's details.

Consumers may verify the authenticity of a hallmark by entering the HUID into the BIS Care mobile application or the BIS web portal, receiving immediate confirmation of the article's certified fineness and provenance within the hallmarking chain. This digital traceability layer distinguishes the Indian HUID system from many older hallmarking regimes that rely solely on physical marks, which are susceptible to counterfeiting. The system also provides enforcement authorities with an audit trail, enabling the identification of AHCs or jewellers associated with anomalous or fraudulent submissions.

Phased Geographic Rollout

The initial coverage of 256 districts was a pragmatic acknowledgement of the uneven distribution of AHC infrastructure across India. Districts were selected on the basis of existing assay centre capacity, ensuring that jewellers in covered areas had reasonable access to hallmarking facilities without prohibitive logistical burden. The BIS committed to expanding coverage progressively as new AHCs were accredited and existing centres increased throughput.

By subsequent regulatory notifications, the covered district count was expanded in stages, with the stated policy objective of achieving nationwide coverage. Certain categories of jewellery were initially exempted — including items destined for export, jewellery made to order for international buyers, and some categories of antique and heritage pieces — to avoid disruption to established export trade flows and to address the practical difficulty of hallmarking articles of unusual construction or extreme fragility.

Impact on the Trade

The immediate effect of the mandate was a sharp increase in demand for AHC services, exposing capacity constraints in several regions. The BIS accelerated the accreditation of new centres and introduced measures to streamline the submission and collection process for registered jewellers. Small and artisanal jewellers, who had historically operated outside formal quality-assurance frameworks, faced the steepest adjustment, both in terms of process compliance and the modest per-piece hallmarking fee charged by AHCs.

Larger organised retail chains and export houses, many of which had already adopted voluntary hallmarking as a brand-differentiation strategy, adapted with relative ease. For this segment, the mandate effectively levelled the competitive landscape by removing the cost advantage previously enjoyed by non-hallmarking sellers. Industry bodies including the All India Gem and Jewellery Domestic Council (GJC) played an active role in disseminating compliance guidance and lobbying for workable transition timelines.

From a consumer-protection standpoint, early enforcement actions documented by BIS and state consumer affairs departments confirmed that the incidence of under-carated gold in the retail market declined materially in covered districts following implementation, validating the core rationale for the reform.

International Context

India's mandatory hallmarking framework joins a global architecture of gold purity assurance that includes the UK Hallmarking Act 1973 (administered by the four Assay Offices of London, Birmingham, Edinburgh, and Sheffield), the Vienna Convention on the Control of Articles of Precious Metals (the Common Control Mark system used by participating European states), and the Gulf Cooperation Council's mandatory hallmarking requirements for gold sold in member states. While the specific caratage standards and administrative mechanisms differ across jurisdictions, the underlying consumer-protection logic is consistent: an independent, state-backed assay and marking system that gives buyers verifiable assurance of the metal content they are purchasing.

India's HUID innovation — the integration of a digitally verifiable unique identifier with the physical hallmark — is regarded by some in the international gemmological and precious-metals community as a model worth examining for adoption elsewhere, particularly in markets where hallmark counterfeiting has been a persistent enforcement challenge.

Significance for the Gemstone and Jewellery Trade

For the coloured-gemstone and diamond trade, the mandatory hallmarking regime has an indirect but meaningful consequence. A substantial proportion of India's gold jewellery is gem-set, and the obligation to hallmark the gold mount applies regardless of whether stones are present. This has prompted renewed attention to the integrity of the complete article — metal and stone together — and has encouraged some segments of the trade to pair BIS hallmarking of the mount with gemstone grading reports from accredited laboratories, offering consumers a more comprehensive quality assurance package. The reform has thus contributed, at least at the premium end of the market, to a broader culture of documented provenance and certified quality that aligns with international best practice.

Further Reading

• Bureau of Indian Standards — About Hallmarking
• Bureau of Indian Standards — HUID Information
• World Gold Council — Gold Demand Trends (India market data)