Clarity

The clarity of a diamond is based on the number, location, size and type of inclusions found in the stone. An inclusion is an imperfection or trace mineral in the stone that is visible under the magnification of a Grader's loupe. The fewer the inclusions, the clearer, brilliant and expensive the diamond will be. A "flawless" diamond is the one that has no inclusions and is extremely rare and valuable. Doing wholesale diamond business for such flawless diamonds is very prestigeous to any diamond merchant.
The clarity of a diamond refers to its inclusions, which are some black, grey or white marks that internally flaw the diamond’s structure. These small imperfections are graded under 10x magnifying glass loupe, which is standard to grade a diamond’s clarity. A diamond, with fewer inclusions, is both rare and more desired which also makes it more expensive. A diamond with a purity of IF to VS2 will sparkle with great intensity whereas diamonds with a purity ranging between SI1 and SI2 will only sparkle. Diamonds between I1 and I3 will lack any sparkle and life and its inclusions will be noticeable to the naked eye. All conditions being constant, lesser the inclusions, greater the life and greater the sparkle of a diamond. Thus, the more will one pay for it. It is rare to find such diamonds for sale.

Wholesale Diamonds and individual diamonds are graded on the basis of Purity by determining following categories:

Purity Description
FL-IF
VVS-1/VVS-2
VS-1/VS-2
SI-1/SI-2
SI-3
I1-3