The color of [b]diamonds[/b] varies from colorless to shades of yellow. Ideally diamonds should have no color. The colorless [b]diamonds[/b] are of highest quality. The colors of diamonds are measured on a scale which ranges from D to Z. D signifies the diamond has no color. Z shows that diamond have deep colors. Beyond Z the diamonds fall into fancy categories. Colorimeter is a machine which is used to grade the diamonds color.
The calor grading scale was first developed by Gemological Institute of America (GIA). The [b]colored diamonds[/b] are very limited in number so they have a rare supply. Some of the diamond colors like intense purplish pink one of the most rare colored diamonds could cost more then $100,000. Generally colors between D and L are most rare and expensive. Diamonds having yellow tints are camparatively cheaper.
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