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Clarity Grade

Clarity Grade

“Flawless” is a word often heard in association with diamonds, but almost all diamonds have naturally occurring imperfections which bear witness to their millennia-long formation in the Earth’s mantle. These imperfections are sometimes referred to as “inclusions” if they’re inside the diamond and “blemishes” if they appear on the surface of the diamond.


  • Clarity refers to the size, number and location of inclusions and blemishes
  • The higher the clarity grade, the fewer imperfections
  • Of all the Four C’s, clarity has the least impact on a diamond's beauty


Diamonds are graded for Clarity according to the size, position and number of imperfections that are visible. Most inclusions and blemishes are microscopic and are detected by gemmologists using 10x magnification – meaning most are invisible to the naked eye. For this reason, of all the Four C’s, the Clarity grade is generally considered to affect a diamond’s appearance the least.


Clarity Chart

Flawless, Internally Flawless
Internally Flawless clarity diamond example


Very Very Slightly Included
VVS1 clarity diamond example VVS2 clarity diamond example


Very Slightly Included
VS1 clarity diamond example VS2 clarity diamond example


Slightly Included
SI1 clarity diamond example SI2 clarity diamond example






Whilst it’s possible to buy diamonds that are internally flawless – ones without any inclusions or blemishes even at very high magnifications – these stones are extremely rare and expensive. In reality, most diamonds are technically flawed yet it’s the little imperfections which make each stone unique. They may be cut the same, possess the same colour density and be of the same carat weight, but no two diamonds will look the same under the microscope. 


When you buy a diamond from us, you’ll receive an independent grading report with a diagram to show the location of any inclusions and blemishes. This is your diamond’s unique fingerprint – no one else will have a diamond exactly like yours.


Clarity Guide


FL - IF Flawless, Internally Flawless No inclusions visible under 10x magnification. Extremely rare.
VVS1 - VVS2 Very, Very Slightly Included Very few minute imperfections barely detectable under 10x magnification. Very rare and beautiful.
VS1 - VS2 Very Slightly Included Small identifying characteristics visible under 10x but invisible to the unaided eye. 
Beautiful and excellent quality diamonds.
SI1 - SI2 Slightly Included Imperfections are easily visible under the microscope and may be visible to the eye. Offers good value for money.
I1 - I3 Included Many imperfections visible to the unaided eye. We do not offer this grade.




We Say
Any diamond with a clarity grade of VS2 or higher will appear perfectly clear to the unaided eye so dropping a grade here can give you more to spend on the setting - without affecting the appearance of the diamond.