A rose-gold ring band on a goldsmith’s bench beside a jeweller’s loupe and an engraving tool

The Goodwill of the House

BIS Hallmarked Gold

Purity You Can Trust.

Every Carbon jewel is crafted in BIS Hallmarked Gold, assuring you of independently verified gold purity in accordance with the standards set by the Bureau of Indian Standards.

Each hallmarked piece carries a HUID (Hallmark Unique Identification), providing traceability and an added layer of authenticity.

A gold band held in a ring clamp on a goldsmith’s bench, with gold dust and a graver

Certified Purity

Gold purity verified as per BIS standards.

HUID Traceability

A unique identification linked to the hallmarking of your jewellery.

Assured Authenticity

Clear, recognised assurance of the gold used in every Carbon creation.

A brushed gold band standing on its edge on a pale stone slab

Made with Confidence

Because exceptional jewellery begins with materials you can trust.

BIS, Bureau of Indian Standards hallmark

The Carbon Standard

Hallmarked. Traceable. Assured.

Speak to a Carbon advisor

For certificates, hallmarks or the terms of your piece, our team will walk you through every detail.

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