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Diamond education

Learn what makes a diamond brilliant.

From its origins to the 4Cs that define its quality and value — a simple, interactive guide to buying with confidence.

The basics

What is a diamond?

Diamonds are more than stunning gemstones; they're symbols of love, luxury and enduring strength. Formed under immense pressure and heat, they possess an unmatched fire and brilliance that has captivated people for centuries.

And that brilliance can be responsibly created too. Lab grown diamonds offer the same mesmerising beauty without the environmental impact of traditional mining — they're indistinguishable from mined diamonds, without compromising on quality or beauty.

CPure carbon, in a crystal lattice
10Hardest natural material (Mohs scale)
4CsThe universal language of quality
Diamond quality

Unveiling the 4Cs.

Carat weight, colour, clarity and cut — a global method that lets diamond quality be expressed in one universal language, so you know exactly what you're buying. Tap a grade to see the difference.

Light performance
ExcellentMost light returns to your eye
Brilliance & sparkle

Cut

The cut of a diamond decides how well it plays with light — how well it is faceted, proportioned and polished. It has the biggest influence on beauty and sparkle, and is often regarded as the most important (and most difficult) of the 4Cs. It's also the only C not decided by nature. A well-cut diamond means maximum brilliance — a timeless symbol of elegance.

Cut grade Tap to compare
Our tip: spend on cut first. An excellent cut can make a diamond look brighter — and even larger — than a heavier stone with a poor cut.
Put your knowledge to use

Now you know the 4Cs — find your diamond.

Explore our certified lab grown diamonds, or let an expert help you choose.