Clarity
The purer the clarity of the diamond, the more beautiful and valuable it is. Like any naturally occurring substance, diamonds contain identifying characteristics. These natural phenomena—called inclusions—may not be visible to the naked eye, but can usually be seen through a jeweler's 10x- magnifying loupe. They often look like tiny crystals, clouds, or feathers. Diamonds categorized as internally flawless reveal no such inclusions and are treasured for their rarity and beauty. Diamonds with very, very small inclusions are graded as VVS1 or VVS2. The larger the inclusion, the lower the grade and the less rare the diamond. The number, color, type, size and position of surface and internal inclusions affect a diamond's value. Major inclusions can interfere with the path of light that travels through a diamond, diminishing its brilliance and sparkle and therefore its value.

GIA Clarity Grading Scale

F	IF	VVS	VVS2	VS1	VS2	SI1	SI2	I1	I2	13
Flawless, Pure		Very Very Slightly Included		Very Slightly Included		Slightly Included		Included