Diamond Grading 101
Not all diamonds are created equal. A diamond's value and quality is determined by looking at the 4 C's, Clarity, Cut, Color, and Carat Weight. This page is here to help you become an informed buyer, and understand these characteristics. A diamond's price will also be affected by it's shape, and whether or not it has been professionally graded.
As long as inclusions do not affect the passage of light through the diamond, they will not detract from the diamond's beauty.
Below is a chart showing the most common grading scale for diamond clarity. A Flawless stone is the highest and most expensive grade, and will be quite literally, flawless. An Imperfect stone, will have blemishes visible to the naked eye. Any stone from an SI to an IF rating, will have at least minor flaws, but none will be visible to the naked eye.
|GIA Clarity Grades|
|FL. INT. FL.||VVS1||VVS2||VS1||VS2||SI1||SI2||I1||I2||I3|
|INT. FL.||Internally Flawless|
|VVS||Very Very Slightly Included|
|VS||Very Slightly Included|
A diamond that has been cut to these proportions is considered to have an "Ideal Cut". Less than 1% of diamonds are cut to ideal specifications. The image above shows a round shaped diamond with an ideal cut.
At Bennett's, we evaluate the cut of every diamond we buy by using a precise millimeter gauge which evaluates width, depth, crown height, and pavilion depth.
Some of the most popular shapes are round, pear, oval, and emerald cut.
The color grade will be a letter from D, to Z. The difference between two close grades, e.g. D and E, will be very subtle, so it may be better to look at the broader categories a diamond's caller may fall under.
A chart showing what category each letter grade is in, is shown below.
|GIA Color Grades||Category|
|O||Very Light Yellow|
There are also professional diamond grading services offered by a few diamond labs. The biggest are the Gemological Institute of America(G.I.A), and the American Gem Society(A.G.S). Buying a professionally graded diamond, will come with a certificate of authentication, proving that your diamond has been graded using widely recognized standards. This will increase the price of any diamond you purchase.
If you want a certified diamond, just let us know and we will find you one. We also have a G.I.A. certified gemologist, that is able to grade, and issue G.I.A. certifications for any diamond we sell.