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Color

Diamonds, not commonly known, occur in all colors of the rainbow — steel gray, white, blue, yellow, orange, red, green, pink to purple, brown, and black. Colored diamonds contain structural defects that cause the discoloration, while pure diamonds are perfectly transparent and colorless. Diamonds are scientifically classified into two main types and several subtypes, as per the nature of impurities present and how these impurities affect light absorption:

  1. Diamonds that go in the Gemological Institute of America's scale are valued according to their clarity and color. Poor color is usually not adequate to eradicate the use of diamond as a gemstone. If other gemological characteristics of a stone are good, a low-color diamond can remain more valuable as a gem diamond than an industrial-use diamond, and can be used in diamond jewelry.
  1. Diamonds that go beyond the scale in the rating are known as "fancy color" diamonds. Any light shade of diamond other than light yellow or light brown automatically falls out of the scale. When the color is rare, and when the diamond is intensely colored, a diamond becomes more valuable. Deep blue Hope Diamonds are among the most valuable and sought-after diamonds in the world.

Posted by Alex on 4/02/2008