Illustrated Guide

to the natural beauty and value of coloured diamonds

Black (BK)-blackish (bk):

The darkest colour sensation evident to the eye and the mind. A nonspectral colour the opposite of white, it is also a neutral colour lacking saturation yet having a measurable range of lightness. Black is inherently dull in tone, yet individual black colours can vary in tone, resulting in pale (charcoal) black, dull (ink) black and bright (gun metal) black, all having weak saturation. Popular names for different mixtures of black are charcoal, gun metal, ink, jet, midnight, onyx and pitch.