The 4 C's of Diamonds
The value of a diamond is determined by its Cut, Color, Clarity and Carat, also known as the classic "Four C's". Understanding such criteria as diamond grading reports, and the factors effecting a diamond's cost will help the buyer make a confident and sound decision when making a purchase.
The color scale is used to evaluate a diamond's internal tint, as well as playing a significant role in determining its price, colorless diamonds being the most desirable of course. Color is best evaluated in natural light, as high intensity artificial lighting can make the diamond appear to be of a better color grade than it actually is. Diamonds should also be examined for fluorescence, as blue photoluminescence will also make the diamond appear to be of a better color grade.
GIA Color Grades
- (D-F) Colorless - tint nearly undetectable to unaided, trained eye even when compared to white standard.
- (G-H) Near Colorless - tint almost undetectable to the trained eye, but apparent when compared to white standard.
- (I-J) Near Colorless - trace of tint just detectable to the trained eye, but noticeably apparent when compared to white standard.
- (K-M) Faint Yellow to Faint Brown - tint apparent to the trained eye and readily apparent when compared to white standard.
- (N-R) Very Light Yellow to Very Light Brown - tint is easily apparent to the unaided, trained eye.
- (S-Z) Light Yellow to Light Brown - tint is obvious to the unaided, trained eye.