HUID
BIS describes HUID as a six-digit alphanumeric Hallmark Unique Identification number, unique to each hallmarked item and traceable through the BIS system. Since 1 July 2021, the gold hallmark consists of three components: BIS logo, purity/fineness mark, and six-digit HUID
1. Jewellery submitted by BIS-registered Jeweller
The process begins when a BIS-registered jeweller submits gold jewellery to a BIS-recognised Assaying & Hallmarking Centre (A&H Centre) through the BIS online hallmarking system.
The jeweller creates a hallmarking request and provides relevant details such as the article category, quantity, weight and declared purity. BIS states that only registered/certified jewellers can submit jewellery to an A&H Centre for hallmarking
2. Receipt and identification of articles
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2. Receipt and identification of articles
At the A&H Centre, the consignment is received and the articles are checked against the online request.
The centre verifies details such as:
Number of articles
Weight
Declared purity
Article category
Request details
Physical condition and markings
The centre maintains the relevant process information digitally as part of the automated hallmarking workflow
3. Weighment of each article
Each jewellery article is weighed using the appropriate calibrated weighing equipment.
The article-wise weight is recorded in the hallmarking system. BIS has specifically described capturing the weight of each jewellery item as part of the automated workflow.
4. XRF testing / preliminary analysis
The jewellery undergoes X-ray fluorescence (XRF) analysis as part of the assaying process.
XRF provides a rapid preliminary assessment of the elemental composition and helps determine whether the declared fineness is consistent with the article.
5. Sampling and assaying
Where applicable, sampling and further assaying are carried out according to the applicable BIS standards and procedures.
For gold, BIS identifies IS 1418:2009 for determination of gold in bullion, alloys and jewellery/artefacts by the cupellation (Fire Assay) method.
The purpose of assaying is to establish the actual precious-metal content and determine whether the article meets the applicable fineness requirements.
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