The 4 C’s of Diamonds

Part II - The Color

The colour of gemstones is among their most mysterious features. At the same time, this is one of the most important characteristics, as it is colour that attracts the human eye.

The colour palette of diamonds ranges from pink through red (rare), blue, green, yellow and brown to black. Diamonds are not all truly colourless; it is the colourless diamonds, (sometimes called white diamonds) that all other stones are compared against. A “perfect” diamond crystal that contains no trace elements or colour centres is absolutely colourless. The colour of a diamond depends on the quantity and nature of the included trace elements and how these originated.

“Colourless” diamonds are graded in 9 different shades. The finest is exceptional white, and yellow/brown tinge is the lowest. The GIA developed the grading system of using letters D through to Z, where D is the highest colour.