The Steadfast Guide to Diamonds

Clarity

Most diamonds have imperfections which are called inclusions. 'Clarity' is a measure of how many and how pronounced these inclusions show themselves to be. The table below will explain the terms used in the trade. The fewer inclusions the more expensive the diamond (with everything else being equal).

As you can see from the table, the grading is done with 10x magnification, which means you are unlikely to see any difference between a flawless and a 'VS' diamonds with the naked eye. This is why I use 'VS' and 'SI' stones which are good quality, high to mid-range stones that I feel offer the best value for money. There is not much difference between 'VS' and 'SI' diamonds in grading but the price difference can be considerable even though the inclusions are only found are with 10x magnification.

Under 0.47cts0.47cts and overDescription
FlawlessFlawless A diamond is called flawless if under these conditions it has been found absolutely transparent and free from inclusions.
VVSVVS1 / VVS2 Very very small inclusion(s) very hard to find with 10x magnification.
VSVS1 / VS2 Very small inclusion(s) which can hardly be found with 10x magnification.
SISI 1 / SI 2 Small inclusion(s) easy to find with 10x magnification. Not seen with the naked eye through the crown side.
Pique 1Pique 1 Inclusion(s) immediately evident with 10x magnification, difficult to find with the naked eye through the crown side.
Pique 11Pique 11 Large and/or numerous inclusion(s) easily visible to the naked eye through the crown side and which reduces the brilliancy of the diamond.
Pique 111Pique 111 Large and/or numerous inclusion(s) very easily visible to the naked eye through the crown side and which reduces the brilliancy of the diamond