Diamond Guide
Buying a diamond is one of the most considered purchases you will make. Our experts have written these guides to give you the knowledge to choose with confidence — whether you are selecting a stone in Hatton Garden or browsing online.
C
Colour
D to Z grading scale
C
Cut
Light return & brilliance
C
Clarity
Inclusions & blemishes
C
Carat
Weight & apparent size
The 4Cs — colour, cut, clarity and carat — form the universal language of diamond quality. Understanding them helps you balance beauty with value, whether you are drawn to a classic round brilliant or a distinctive oval or cushion cut. Every diamond we offer comes with independent certification from GIA or IGI, so you can buy with complete confidence.
If you already know your preferences, our ring builder lets you pair any diamond with your chosen setting. We also carry a curated selection of lab-grown diamonds — chemically identical to mined stones and independently graded to the same standard.
All Diamond Guides
Ready to choose your diamond?
Explore our engagement ring collection, search our live inventory, or visit us in Hatton Garden for one-to-one guidance.