Colour of diamond refers to a diamond absence of color. The most popular grading system adopted widely nowadays is GIA (Gemology Institute of America). GIA grades diamonds’ colour from D (colorless) to Z (faint yellow tinge). For D to H graded diamond, it is difficult for non-professionals to identify, especially for those which have already been set on jewelry. Diamonds with higher color appears to be whiter but both high and low-colored diamonds can offer good luster, brilliance and scintillation.
(Please go to http://gia4cs.gia.edu/EN-US/the-diamond-4-cs.htm for more information about 4Cs by
Gemological Institute of America)
Diamond Colour Grading
According to GIA approval, colour grade would be defined from D to Z. The colour with D grade is the premier possible.
D grade diamonds are the highest and completely colourless diamond. They are extremely rare some people are fond of this colour.
E grade diamonds are almost completely colourless. They are very rare and only very minor traces of colour can be identified by an expert gemologist.
F grade diamonds are almost colourless. They are rare and very small traces of colour can be found by an expert gemologist.
G grade diamonds are nearly colourless. It is difficult to detect by naked eye unless use side by side method to compare with a better colour diamond.
H grade diamonds are next to colourless. They have absolutely white colour when face up or after setting in Jewelry. It is difficult for non professional to detect.
I grade diamonds have very slight tinge of colour. They look white when face up or after setting in Jewelry. This colour offers great value.
J grade diamonds have slight tinge of colour. They look quiet white when face up. J grade is always 10% to 20% cheaper than I colour.
K grade diamonds have very minor yellow tinge of colour. They still look quiet white when face up. They are suitable for those not looking for colourless diamond.
L grade diamonds have slight yellow tinge of colour. They are good choice for budget buyer.
M grade diamonds have little yellow tinge of colour. They are very good choice for customer with limited budget.
N-Z grade diamonds are not offered by Diamond Collection.
Fancy colour is different from colourless or yellow tinge of colour. The colour shown in fancy colour diamonds are a natural colour. Since diamond possesses natural colour is scarcity (only 1% of all diamonds), which is very precious.