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The knowledge library

A clearer understanding.

Good questions lead to better decisions. Explore the material, the craft and the information that travels with a diamond.

01

The 4Cs

Cut, colour, clarity and carat. Explore four measures that need to be read together.

Explore the guide
02

Diamond shapes

Eleven outlines, different facet families and the details that define their character.

Explore the guide
03

Natural & laboratory-grown

Understand origin, material properties and the questions to ask about disclosure.

Explore the guide
04

Cut & proportions

How dimensions and facet relationships influence the way a stone presents itself.

Explore the guide
05

Grading reports

What an independent assessment tells you, and how to verify the report.

Explore the guide
06

Fluorescence

A diamond’s response to ultraviolet light, explained in context.

Explore the guide
07

CVD growth

Chemical vapour deposition, from growth method to finished material.

Explore the guide
08

HPHT growth

High pressure and temperature, and the distinction between growth and treatment.

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09

Diamond care

Gentle cleaning, considered storage and care for the setting around the stone.

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