Clarity - Refers to the presence of
inclusions in a diamond.
Clarity Catagories
FL - IF
Diamonds that reveal no flaws on the surface or internally.
These are the rarest and most beautiful gems treasured
for their absolute purity.
VVS1 - VVS2 Diamonds with minute inclusions absolutely
invisible to the naked eye. Only through careful inspection
with a microscope can these tiny inclusions be accurately
pinpointed. The brilliance of the stone does not suffer
in this category.
VS1 - VS2 Diamonds with tiny inclusions difficult to
locate. Only a trained eye looking through a 10X loupe
can pinpoint the inclusions in this category. The inclusions
are nearly impossible to see with the naked eye.
SI1 - SI3 Diamonds with inclusions easily identified
through a loupe. Finding flaws in this category with
the naked eye is difficult. The gems in this category
maintain their integrity, depending on the location
of the inclusions.
I1 - I3 Diamonds with inclusions which may or may not
be easily seen by the naked eye. The flaws on the stones
in this category will have some effect on the brilliance
of your diamond.

One this website you will see links to
JamesAllen.com
where you can purchase diamonds safely from the USA.
In the UK and Europe the diamond market is very highly
controlled to inflate profit margins to grossly unreasonable
levels. In the USA the markets are freer and you, the
customer, can make seriously huge savings. The UK jewellers
will tell you the diamonds are of less quality. That
is nonsense. Diamonds are certified for quality, so
don't be fooled! Buying a diamond from the USA will
give you a lot more diamond clarity for your money!
And how important will a flawless diamond be to her?
For anything further you'd like to know about the 4C's,
please don't hesitate to email your questions: