brown diamonds
 
From subtle champagnes to rich cognacs, brown diamonds are the new classic. Their golden tones make them a softer, gentler alternative to the colorless diamond, and their neutral color makes them the perfect choice for fashion jewelry with a contemporary feel.
 
 
brown Origin
Brown Diamonds are found in Southern Africa, Siberia and Australia. The Argyle Diamond Mine in Western Australia is the world's largest producer of these stones.
 
 
Color Formation
Diamonds become brown when heat and pressure deep within the earth cause the crystal lattice to distort. These distortions cause Brown Diamonds to absorb a continuum of wavelengths increasing toward the blue region of the spectrum and hence imparting a brown color. This can often be seen as in parallel bands within the diamond. Brown Diamonds may be modified by an orange, yellow or pink color. www.champagnediamondcenter.com/
 
 
 
STRENGTH OF COLOR
The strength of color is one of the most mportant factors in determining the value of a natural color diamond. The value of a natural color diamond increases with the intensity of the most prominent color within the diamond.
 
 
 
 
The Argyle Diamonds C1 to C7 color scale below remains the most widely used color scale for brown diamonds.

C-1

C-2
 
 
Light Brown

C-3

C-4
 
 
Medium Brown
 

C-5

C-6
 
 
Light Brown

C-7
 
 
Deep Brown