Diamond colorless is classified as D grade, which is the highest level of diamond color. It is perfectly colorless and has the highest relative rarity. Diamonds can be classified into three series based on color, namely colorless to light yellow series (Cape series), brown series, and colored series. The commonly seen colorless to light yellow series on the market, the value of diamonds in this series gradually decreases from colorless, almost colorless to slightly yellow light yellow.
GIA Diamond Color Classification
D-level:
Grade E:
F level:
G~H level:
I~J level:
K~M level:
N-Z level: