- D color diamonds are the most colorless diamond, technically. This means they are the iciest, the brightest, and the whitest of all diamonds. For this reason, they are also the costliest.
- It is advised to avoid buying medium, strong, and very strong fluorescence in D colored diamonds. These diamonds can appear milky, while they appear less bright when kept indoors. This is not a property of faint fluorescence.
- Antique D diamonds are rarer than the normal D colored ones. In addition, many have been resized to the modern standards. This has resulted in a drop in availability. Consequently, the price also is the highest. Considering the fact that a D color is the whitest on the scale, the price is justified.