Diamonds, more than any other gemstone, have the capability to produce the maximum amount of lustre.

A diamond that is virtually free of interior inclusions or exterior flaws is of the highest quality, for nothing interferes with the passage of light through the diamond.

To determine a diamond's clarity, it is viewed under a 10-power magnification by a trained eye. Minute inclusions neither mar its beauty nor endanger its durability.

Grading scale for inclusions
F1		Flawless
1F		Internally flawless - minor surface blemishes
VVS(1)-VVS(2)		Very, very small inclusions
VS(1) - VS(2)		Very small inclusions
S1(1) - S1(2)		Small inclusions
P(1) - P(11) - P(111)		Inclusions visible to the naked eye