You pick out a beautiful gold necklace, pay a good price for it, and walk home feeling happy. But how do you actually know the gold inside is as pure as the label says? That's exactly the problem BIS hallmarking was built to solve.

Whether you're planning to buy gold ring online or stepping into a showroom to pick out something special, understanding hallmarking before you spend is one of the smartest things you can do.

What Is BIS Hallmarking?

BIS stands for Bureau of Indian Standards — India's official quality certification body. When a piece of jewellery carries a BIS hallmark, it means the gold purity has been independently tested and verified at a government-recognised Assaying and Hallmarking Centre (AHC).

Since April 2023, BIS hallmarking has been mandatory across most districts in India. Selling unhallmarked gold jewellery in these regions is illegal, and buyers have full legal protection if something doesn't match up.

What the Hallmark Actually Tells You

Every BIS-hallmarked piece carries three marks laser-etched directly onto the metal:

  • BIS logo – a triangle with "BIS" inside, confirming official certification
  • Purity/fineness mark – a number like 916 (22K), 750 (18K), or 585 (14K) showing exactly how much gold is in the piece
  • HUID – a unique six-character alphanumeric code assigned to that specific piece

The HUID is the most important of the three. Think of it as the jewellery's Aadhaar card — every ring, necklace, and pair of earrings gets its own individual code, registered in the national BIS database.

How to Verify Your Gold Using the HUID

This takes less than two minutes:

  • Download the BIS Care app (free on Android and iOS)
  • Tap "Verify HUID" and enter the six-character code from your piece
  • The app will return the confirmed purity, the jeweller's name, the hallmarking centre, and the date of certification

If any of those details don't match the piece you're holding or the invoice you received, that's a red flag worth acting on immediately.

Where to Find the Hallmark on Your Jewellery

The mark is small but always there on genuine pieces:

  • Rings – inside the band
  • Necklaces and pendants – on the back of the pendant or near the clasp
  • Earrings – on the post, between the setting and the backing

If a jeweller can't show you where the hallmark is, that's reason enough to walk away.

Buying Gold Necklace Designs or Earrings Online? Here's What to Check

Online shopping makes it easier than ever to browse gold necklace designs from the comfort of your home, but it also means you can't physically inspect the piece before buying. Always check that the product listing clearly states BIS hallmarking and the karat — if it doesn't mention either, skip it.

For those looking to buy gold earrings for women as a gift, look for the HUID on the product description or ask the seller for it before completing the order. A trustworthy retailer will always have it ready.

How Jos Alukkas Makes This Easier

Jos Alukkas sells only BIS hallmarked gold jewellery, so the purity question is answered before you even add to cart. And if you're unsure how a necklace or ring will actually look on you before buying, the Virtual Try-On feature lets you see the piece on yourself in real time using your phone or laptop camera — no app download needed.

It's a small detail that takes a lot of the second-guessing out of online gold shopping.

Hallmarking isn't a technicality meant for jewellers — it's a tool built for buyers. Once you know what to look for and how to verify it, you'll never have to wonder if your gold is genuinely what it claims to be.