More Than Just Glitter: What is Gold Purity?
Gold in its absolute purest form, known as 24-karat (24K) gold, is 99.9% pure. However, it is also very soft and easily damaged, making it unsuitable for most jewellery. To increase durability, pure gold is mixed with other metals like copper or silver
to create an alloy. This is where karats come in. The karat system measures purity on a scale of 24. For instance, 22-karat (22K) gold, a popular choice for jewellery in India, contains 22 parts gold and 2 parts other metals, making it 91.6% pure. Similarly, 18K gold is 75% pure gold. This percentage of purity, also called fineness, is what determines the intrinsic value of your gold asset.
Your Official Stamp of Trust
A hallmark is an official certification stamped on gold items to verify their purity. In India, this system is regulated by the Bureau of Indian Standards (BIS). Since June 2021, the government has made it mandatory for jewellers to sell only hallmarked gold jewellery and artefacts of 14K, 18K, and 22K purities. This was done to protect consumers from being cheated with low-purity gold sold at high prices. Think of the BIS hallmark as a government-backed guarantee that the gold you are buying meets a strict standard of fineness, ensuring you get exactly what you pay for.
The Anatomy of a Modern Hallmark
A genuine BIS hallmark on gold purchased after mid-2021 consists of three mandatory components that you should look for, often requiring a magnifying glass to see clearly. The first is the iconic triangular BIS logo, which confirms the item has been certified in a licensed lab. The second is a purity mark, which indicates the karat and fineness (e.g., '22K916' for 22-karat gold that is 91.6% pure). The third and most crucial modern addition is the Hallmark Unique Identification (HUID) number. This is a six-character alphanumeric code unique to each individual piece of jewellery, acting like its fingerprint.
What is the HUID Number?
The HUID system is a game-changer for gold buyers. Introduced to enhance transparency and traceability, each six-digit code is linked to a central database maintained by BIS. When an item is hallmarked, details like the jeweller, the specific assaying centre that tested it, its purity, and the type of article are logged against its unique HUID. This makes every single piece traceable from the point of certification. The system is designed to prevent fraudulent hallmarking and gives consumers a powerful tool to verify their purchase independently.
How Hallmarking Protects Your Investment
Evaluating these markers is fundamental to long-term asset safety for several reasons. Firstly, it guarantees purity, ensuring you are not overcharged for an item with less gold content than claimed. Secondly, it provides a massive advantage in resale value. A hallmarked gold coin or piece of jewellery will fetch a fair market price because its purity is trusted and verifiable. Non-hallmarked gold often gets a lower valuation as the buyer has to factor in the risk of impurity. Finally, it gives you legal recourse. If a hallmarked item is found to have a lower purity than marked, the HUID allows it to be traced back, and you can file a complaint with BIS.
Your Gold Buying Checklist
To ensure your investment is secure, follow these simple steps. First, always buy from a BIS-certified jeweller. Second, physically inspect the item for the three hallmark symbols: the BIS logo, the purity mark, and the six-digit HUID. Third, and most importantly, verify the HUID yourself. You can do this instantly using the 'Verify HUID' feature on the official 'BIS CARE' mobile app, which is available for both Android and iOS. The app should display details that match the item you are holding. Do not rely on a screenshot from the jeweller; perform the check on your own device.
