A ideal cut which has no apparent colour is termed colourless. The colourless ideal cut diamonds transforms the light which enters it and acts as a prism, dividing light into a rainbow of colours known as the ‘fire’ of the diamond.
Flawless diamond earrings are no more beautiful to the unaided human eye than a grade in the middle of the scale. Once again, extremely subtle differences in clarity are very important to determine rarity, but only affect beauty when in the very low end of the scale.
From around the fifth century diamond necklace was a symbol of a king´s strength, courage and invincibility. Since then the ideal cut diamonds has become - and still is - a symbol of love.