The 4 C's of Diamonds - Clarity

Diamond clarity refers to the natural internal and external characteristics found within a diamond - often called inclusions and blemishes.

Diamonds are formed deep within the Earth under extreme heat and pressure. During this process, tiny natural features develop, making every diamond entirely unique. These inclusions act like fingerprints, telling the story of a stone’s formation over millions of years.

Clarity grading assesses:

> The number of inclusions

> Their size and type

> Their position within the stone

And how they affect the diamond’s appearance and durability

Importantly, no natural diamond is completely free from inclusions. Clarity is not about perfection, it’s about balance.

HOW DIAMOND CLARITY IS GRADED

Diamond clarity is graded on an internationally recognised scale, ranging from Flawless (FL) to Included (I). Grading is carried out under magnification, typically at 10x.

Here’s a simple guide to the clarity scale:

Flawless (FL)
No inclusions or blemishes visible under magnification.

Internally Flawless (IF)
No internal inclusions visible under magnification.

Very, Very Slightly Included (VVS1 & VVS2)
Inclusions are extremely difficult for a skilled grader to see under magnification.

Very Slightly Included (VS1 & VS2)
Minor inclusions are visible under magnification with effort.

Slightly Included (SI1 & SI2)
Inclusions are noticeable under magnification and may occasionally be visible to the naked eye.

Included (I1, I2 & I3)
Inclusions are obvious under magnification and may affect brilliance, transparency and durability.

CLARITY IN CONTEXT

Clarity is just one part of the picture. A beautifully cut diamond can appear brighter and more lively than a higher-clarity stone with a poor cut.

That’s why we always encourage viewing clarity alongside the other three Cs:
Cut, Colour and Carat - and choosing what feels right for you.

Explore our diamond engagement rings, or book an appointment to view stones and discuss the details that matter most to you.