Global colour scale for “white” diamonds
From D to Z means 23 different gradations and does not always communicate easily. For this purpose some letters have been combined into a group with a more descriptive name. These are colourless (D-F); almost colourless (G-j); weak (K-M); very light (N-R); and light (S-Z).
diamond colour grading scale
To see what colour a stone has, a set of so-called ‘master stones’ is used to look at each stone the diamond in question matches. If the colour of the diamond – under special lighting and precise conditions – corresponds to a master stone, then the gradation is officially assigned.
Global colour scale for fantasy coloured diamonds
There are no master stones for fantasy colours and the assessment is very precise work. The color determination is done by lab technicians with years of training and specialization in this field.
How does colour influence the value of a diamond?
The value of “white” diamonds
To give you an idea of their value. One of the largest diamonds with D-color quality is the Millennium Star. This diamond is one of the most beautiful of its kind.