KGK One
Emerald, sapphire and ruby resting on a driftwood branch

Precious Gemstones Defining Timeless Elegance

A curated inventory of precious gemstones, sourced across the world's finest origins and graded to the standards your collections demand.

Ruby. Sapphire. Emerald.

Faceted ruby on dark background

Ruby

Cushion-cut sapphire on dark background

Sapphire

Emerald-cut emerald on dark background

Emerald

Precious Gemstones

Emeralds, rubies, and sapphires are the stones demanded by origin, by colour grade. Each one carries the story of where it came from, the vivid greens of Zambia and Colombia, the pigeon blood reds of Burma and Mozambique, the royal blues of Ceylon and Madagascar. These are singular objects, shaped by geography and time, and KGK sources each one directly against a gemological standard your business can stand behind.

Spread of coloured precious gemstones
Master jeweller at the polishing wheel

Sourced Responsibly & Traceable at Every Step.

Every gemstone in KGK's inventory is assigned a unique ID at the point of rough procurement, with photo and media documentation captured from the first moment. From there, every stage of the journey: planning, shaping, polishing and certification by GIA, GRS and AIGS accredited labs, is securely recorded through Gem-Trac, our proprietary traceability program for complete visibility. For buyers who need to stand behind every stone they sell, that chain of custody is already in place.

KGK One reception with the KGK ONE wordmark on the wall

All Your Needs, Handled by One Trusted Partner.

The most successful businesses are built on a foundation of reliable supply, institutional expertise, and a partner who understands every part of the trade as well as you do.

KGK One is built to deliver exactly that. One fully integrated partner across every category your business needs, backed by 120 years of expertise and operations across 15 countries. The supply chain infrastructure your business has been looking for.

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Dedicated Sales Team

Your own trade specialist, ready when you need them.

Global Distribution

A global network built to deliver wherever your business operates.

Traceability & Ethics

Responsible sourcing and full transparency across every category.