Learning centre

Understanding natural fancy colour

Colour changes everything about how a diamond is graded and valued. These primers cover what matters most when you buy.

What makes a colour diamond rare

A trace of nitrogen, a stray dose of radiation, or a crystal bent under pressure — the tiny accidents that turn an ordinary diamond into one in ten thousand.

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Grading6 min

Reading the colour grade

Hue, tone and saturation, the ladder from Faint to Fancy Vivid, and how to decode a phrase like "Fancy Deep Orangy Yellow" before you ever see the stone.

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Value6 min

How a colour diamond is priced

Why the familiar four-Cs grid gives way to a single quality — and how rate, rarity and hue combine into the number on the tag.

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Certification6 min

Certificates, treatment and buying with confidence

Why the report is the line between a natural rarity and a treated lookalike — what each lab decides, how to spot treatment, and a checklist for buying safely.

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Buying guide6 min

Fancy yellow diamonds: value, grades and how to buy

The most collected of the fancy colours — from a soft sunlit yellow to the saturated “canary” Fancy Vivids — and what actually moves the price.

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Buying guide6 min

Fancy pink diamonds: rarity, price and how to buy

Among the rarest diamonds on earth, with almost no new supply since the Argyle mine closed — how pink is graded, and what drives its price.

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The colours5 min

Fancy blue diamonds explained

Coloured by traces of boron and found at only a handful of mines — the rarest and most valuable of the fancy colours.

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The colours5 min

Fancy green diamonds explained

A colour written by natural radiation over millions of years — subtle, scarce, and one of the hardest origins for a lab to confirm.

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Buying guide5 min

Buying natural fancy colour diamonds in Hong Kong

Why Hong Kong sits at the centre of the fancy colour trade, and how to buy well from a specialist rather than a generalist.

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Cut5 min

Why fancy colour diamonds are cut differently

A colourless diamond is cut for brilliance; a fancy colour diamond is cut for colour — which is why radiants and cushions dominate.

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