The 4 C's of Diamonds
Diamond Value Guide
Color - Graded on a chart from Z (Yellow) - D (Colorless), with the least color being most valuable.
Carat - The carat refers to the weight of the diamond and is graded on a 100 point scale.
Clarity - There are 11 different grade for clarity depending on the amount of blemishes.
What The Cut Affects
Brilliance: Light that is reflected from the diamond creating brightness
Fire: Dispersion of light into the colors from our visible spectrum
Scintillation: Amount of sparkles and flashes that can be seen when the diamond or light is moved
Cut Grading Scale
Excellent – These diamonds will have the most brilliance and fire while reflecting almost all light that enters the diamond.
Very Good – Reflects a majority of the light that enters the diamond, producing superior fire and brilliance. Diamonds rate “Very Good” will appear similar to “Excellent” diamonds under normal light conditions.
Good – Reflects a majority of the light that enters the diamond, creating an above average appearance.
Fair – Reduced perceived fire and brilliance from allowing light entering the diamond to escape from the sides or bottom.
Poor – Diamond will appear dull and lifeless from allowing a majority of the light to escape from the sides or bottom.
Color Grading Scale
Carat Grading Scale
Clarity Grading Scale
The GIA has eleven different categories in which a diamond's clarity will be graded as. A professional appraiser will look at the stone under various magnification levels, to determine the amount of blemishes and inclusions.
Flawless (FL) - Using 10× magnification, no inclusions or blemishes can be seen by a skilled grader
Internally Flawless (IF) – Blemishes are visible to a skilled grader under 10× magnification but no inclusions
Very, Very Slightly Included (VVS1 and VVS2) - Under 10× magnification, inclusions are difficult to see
Very Slightly Included (VS1 and VS2) - A skilled grader using 10x magnification has little difficulty seeing minor inclusions
Slightly Included (SI1 and SI2) - Inclusions are noticeable to a skilled grader under 10x magnification
Included (I1, I2, and I3) - Transparency and brilliance are affected and inclusions are obvious under 10× magnification