Colorless Diamonds

It is the absence of the appearance of color that represents the highest color grade for colorless diamonds; exceptions of course include the brilliant hues of natural colored fancy diamonds. Completely colorless diamonds are rare and most, although they appear colorless, have a slight tinge of color that is discernible only under magnification and proper lighting conditions Grades of colorless diamonds range from D – Z, with D being the highest grade. Grades E – F are also viewed as colorless, while grades G, H, I and J are near colorless. Colorless grades K. L. and M have mildly discernible hints of color and as the scale approaches P subtle variations in tone and hue are present.

 
COLOR GRADING SCALES
COLOR GIA* CIBJO*
COLORLESS D EXCEPTIONAL WHITE+
E EXCEPTIONAL WHITE
F RARE WHITE+
NEAR COLORLESS G RARE WHITE
H WHITE
I VERY SLIGHTLY TINTED WHITE
J SLIGHTLY TINTED WHITE
FAINT YELLOW

to

FAINT BROWN

K TINTED WHITE
L
M TINTED COLOR 1
VERY LIGHT YELLOW

to

VERY LIGHT BROWN

N TINTED COLOR 2
O
P
Q
R
LIGHT YELLOW

to

LIGHT BROWN

S TINTED COLOR 3
T
U
V
W
X
Y
Z
CHAMPAGNE 
COGNAC 
GREENISH
 
BROWNISH 
YELLOW
C+ FANCY COLOR
LIGHT FANCY
CANARY YELLOW 
GREEN 
BLUE 
PURPLE 
PINK
 
RED
FANCY
FANCY INTENSE
VIVID
* GIA = Gemological Institute of America.  
* CIBJO = Confederation Internationale de la Bijouterie, Joaillsrie, Ortevrerie, des diamants, perles et pierres precieuses.
 

 

Beautiful exceptions to the above referenced Grading Scale are the exotic: blue, pink, green, orange and canary yellow hues of colored fancy, certified natural color origin, unenhanced diamonds from Type IIa.  For every million carats of diamonds mined, approximately one carat of that total will be a colored fancy diamond.  The rare and exotic blue, pink, green, orange and canary yellow colored fancy diamond hues are all derived from that one in a million carats.

Fancy Blue Diamonds

Fancy blue diamond color saturation grades are set forth below  The more pure the hue of the diamond, the more exotic it remains. However, a heavily saturated modifying color combination of Gray-Blue or Green-Blue also affects value. 

   

Fancy Pink Diamonds

Fancy pink diamond color saturation grades are set forth below. The more pure the hue of the diamond, the more exotic it remains.  However, a heavily saturated modifying color combination of purple also increases value while a brown color depresses value.   

   

Fancy Green Diamonds

Fancy green diamond color saturation grades are set forth below.  The more pure the hue of the diamond, the more exotic it remains.  However, a heavily saturated modifying color combination of Yellow-Green or Blue-Green also affects value.    

   

Fancy Orange Diamonds

Fancy orange diamond color saturation grades are set forth below. The more pure the hue of the diamond, the more exotic it remains. However, a heavily saturated modifying color combination of Brown-Orange or Yellow-Orange also affects value.    

   

Fancy Yellow Diamonds

Fancy canary yellow diamond color saturation grades are set forth below. The more pure the hue of the diamond, the more exotic it remains. However, a heavily saturated modifying color combination also affects value.