The value of a diamond depends on its colourlessness. A 
diamond may range from completely colourless to showing clearly visible 
shades of colour. These shades do not affect the clarity nor the beauty 
of diamonds. 
The value of a diamond depends on its clarity as well and it can be classified according to a clarity scale. Like all other 
natural gems, diamonds can have some typical inclusions, which may be 
more or less visible. Inclusions are considered natural imprints of the 
diamond crystal. 
The cutting aims to make the diamond as bright as possible. The quality level of cutting is determined by the balance of symmetry and precision in details.