What Is the Bureau of Indian Standards’ Role in Certifying Gold Purity in India?

Gold jewellery is often purchased with the expectation that its purity matches what is stated at the time of sale. However, understanding how purity is verified can be challenging because several organisations and processes are involved in testing, hallmarking and certification. Questions frequently arise about hallmark marks, fineness numbers, HUID verification and the role played by regulators in maintaining quality standards.

The BIS role in gold purity is central to this framework. The Bureau of Indian Standards (BIS) establishes the standards used for hallmarking, administers the certification system and oversees the network of recognised Assaying and Hallmarking Centres that test jewellery. Recent developments, including HUID-based hallmarking and the inclusion of 9K gold within the hallmarking framework, have further expanded the system.

This article explains the bureau of indian standards gold framework, fineness grades, hallmarking procedures, HUID verification and the connection between certified purity and gold-loan collateral assessment.

BIS as the Statutory Authority for Gold Purity Standards

BIS operates under the BIS Act, 2016 and functions as India’s national standards body. For gold, its role should be separated from the actual testing of an individual ornament.

First, BIS develops and administers Indian Standards relevant to gold purity and hallmarking. IS 1417 specifies grades of gold and gold alloys, while IS 1418 covers assaying of gold in bullion, alloys and jewellery through the fire-assay method. BIS also operates the hallmarking framework and recognises Assaying and Hallmarking Centres that meet prescribed requirements.

Second, an AHC performs the physical assessment of jewellery submitted for hallmarking. It checks whether the item’s fineness corresponds with the purity declared for it and applies the prescribed hallmark after conformity is established.

This distinction is central to understanding the BIS hallmark certification process: BIS sets and supervises the framework, while recognised AHCs perform item-level assaying and hallmarking. Registered jewellers, meanwhile, remain responsible for complying with applicable hallmarking requirements when selling jewellery.

BIS-Recognised Gold Purity Grades and Fineness Levels

Gold purity may be expressed either in karats or through a fineness number. Fineness indicates the quantity of pure gold present in every 1,000 parts of the alloy. For example, a fineness marking of 750 indicates that 750 parts out of every 1,000 parts are pure gold, equivalent to 75% purity.

The following are the six grades highlighted under the current BIS certification gold framework relevant to this guide:

The inclusion of 9K or 375-fineness gold in July 2025 widened the purity range covered by the hallmarking framework. Buyers should still examine the actual hallmark and HUID on an article rather than relying only on a seller’s description.

The table also answers a common purity question: 18K gold is 75% pure gold and carries the fineness number 750.

Note: Permitted grades and mandatory hallmarking requirements can be amended by BIS through notifications. Consumers should check the latest BIS requirements when purchasing jewellery.

Why 916 Is the Most Common Hallmark on Indian Gold Jewellery

A 916 mark indicates 22-karat gold containing 91.6% gold by fineness. It is widely associated with Indian jewellery because it combines relatively high gold content with greater workability than 24K gold.

Gold of 999 fineness is comparatively soft, which can make it less suitable for many intricate jewellery designs. The additional alloy content in 22K gold provides greater practicality for items such as bangles, necklaces and earrings while retaining high gold purity.

How BIS Certifies Gold Purity: The Step-by-Step Hallmarking Process

The BIS hallmark certification process separates the jeweller’s responsibility from independent assaying. Broadly, it works as follows:

1. The jeweller registers with BIS: A jeweller covered by the hallmarking framework must complete the applicable BIS registration requirements before selling hallmarked jewellery.
2. Jewellery goes to a recognised AHC: Articles intended for hallmarking are submitted to a BIS-recognised Assaying and Hallmarking Centre.
3. The centre assesses purity: The AHC carries out prescribed testing and assaying procedures. X-ray fluorescence (XRF) can be used in the assessment process, while fire assay is the reference method used for determining gold fineness under the relevant standard.
4. Conforming jewellery is hallmarked: If the tested article meets the applicable fineness requirements, the prescribed hallmarking details are applied. For the current HUID-based system, consumers should look for the BIS mark, purity/fineness grade and six-character alphanumeric HUID.
5. The hallmarked article returns to the jeweller: Once the process is complete, the jewellery can be sold as hallmarked gold, subject to the applicable BIS rules.

Recognised AHCs operate within the BIS hallmarking system and are subject to prescribed assessment and oversight requirements.

Mandatory hallmarking applies according to government/BIS notifications, including geographical coverage and specified exemptions. A jeweller covered by these requirements cannot lawfully bypass the applicable hallmarking rules.

Note: Hallmarking confirms conformity with the stated fineness under the applicable BIS hallmarking framework. It should not be interpreted as determining resale value, exchange value or loan eligibility, which may depend on separate assessment processes.

HUID: How to Verify BIS-Certified Gold Purity Yourself

A major change in BIS certification gold is that consumers are able to independently verify hallmark information in addition to relying on seller disclosures and invoices.

HUID, or Hallmark Unique Identification, is a unique six-character alphanumeric identifier attached to a hallmarked jewellery article under the current system. The HUID-based hallmarking framework replaced the older marking format for newly hallmarked jewellery, with the six-digit HUID system becoming mandatory for the sale of applicable hallmarked gold jewellery from April 2023.

Consumers can check an HUID through the official BIS Care app:

1. Open the BIS Care mobile application.
2. Select Verify HUID.
3. Enter the HUID appearing on the jewellery.
4. Review the information returned by the system.
5. Compare details such as the jeweller, Assaying and Hallmarking Centre and purity/fineness with the article being purchased.

This makes the hallmark independently checkable after purchase as well as at the jewellery counter.

A related question is what happens when a jeweller’s BIS registration later expires or lapses. That event does not, by itself, alter the physical fineness of an article that was legitimately hallmarked earlier. The specific HUID and hallmark record should be checked through BIS Care, particularly when authenticity is in doubt.

Why BIS Certification Matters When Using Gold as Collateral

The BIS role in gold purity also has a practical connection with gold-backed borrowing. A hallmark provides an established purity reference, while a valid HUID allows relevant hallmark information to be checked. This can make the article’s stated fineness easier to establish before a loan application.

A hallmark, however, does not determine the loan amount. When jewellery is pledged for a gold loan, the lender carries out its own valuation according to applicable lending rules and internal procedures. Eligible net gold weight, assessed purity, prevailing reference value and the applicable loan-to-value limit can influence the amount offered. Stones, gems and other non-gold components are generally excluded from the value of the gold collateral.

Therefore, even BIS-hallmarked jewellery is subject to lender assessment at the time of application. Non-hallmarked jewellery may also require purity testing rather than automatically being treated as a particular lower grade.

Gold owners considering borrowing can check the hallmark and HUID before visiting a branch and review IIFL Finance’s Gold Loan information for applicable eligibility, documentation, valuation, charges and repayment terms.

Note: Gold-loan eligibility, collateral valuation, sanctioned amount, tenure, interest rate and disbursal are subject to applicable regulations, lender policy, purity assessment and documentation. A BIS hallmark or HUID does not guarantee loan approval or a particular valuation.

Conclusion

The key point to remember is that hallmarking is designed to improve transparency around gold purity rather than simply add a mark to a jewellery item. The BIS role in gold purity involves establishing standards, administering the hallmarking framework and overseeing recognised centres that assess jewellery against prescribed fineness requirements. The introduction of HUID verification has also made hallmark information easier to check independently.

Understanding fineness markings, hallmark components and the BIS hallmark certification process can help buyers interpret purity information more confidently. At the same time, hallmarking and HUID verification serve a different purpose from lender valuation or collateral assessment. Whether jewellery is being purchased, sold or considered for a gold loan, reviewing the hallmark, fineness grade and HUID details remains an important part of evaluating the article under the applicable framework.

Disclaimer : The information in this blog is for general purposes only and may change without notice. It does not constitute legal, tax, or financial advice. Readers should seek professional guidance and make decisions at their own discretion. IIFL Finance is not liable for any reliance on this content. Read more