BIS hallmark codes 375 to 999 decoded as India's six-digit HUID regime tightens gold purity rules

An explainer maps gold purity stamps—375 (9K), 585 (14K), 750 (18K), 916 (22K), and 999 (24K)—against India's mandatory BIS hallmarking regime. The 2021 Quality Control Order makes hallmarking compulsory for 14/18/22-carat jewellery in notified districts, with HUID traceability now standard at A&H centres.

— Source publishedFri, 15 May, 2026, 16:12 IST·First seen Fri, 15 May, 2026, 16:43 IST·Source Times of India · Business

What happened

Explainer on gold hallmark purity codes (375-999) and India's mandatory BIS hallmarking regime, including the six-digit HUID system, A&H centres, and the 2021

Key facts

  • 375
  • 585
  • 750
  • 916
  • 999

Why this matters

Targets with clean HUID traceability and A&H centre relationships now command a compliance premium, while non-compliant regional chains become distressed acquisition opportunities at discounted multiples.