When color is prominent the gem is called a fancy or master fancy diamond. In 1936, Polaroid filters were invented, allowing glasses to protect against UV rays for the first time, and making them a desirable item for health reasons as well as for reasons of fashion and comfort useful in World War II, when soldiers had to fight in the French summer. Most of the poker books I read treat the subject in a compartmentalized fashion.
Explanation of Cut, Color and Clarity of This Diamond
Cut Quality Proportions of the premium cut diamonds are very close to ideal cut. Premium cut diamond may be close to the ideal cut proportions and look just identical. By all means such diamonds are considered well cut. In fact, many consumers cannot distinguish between the ideal cut diamond and the premium cut. Appearance of diamond is very subjective and cannot be fully evaluated just by their proportions along.
Color D color diamonds are absolutely colorless. D is the highest color grade. Natural diamonds of this color grade are extremely rare and expensive.
Clarity VVS1 clarity diamonds are very, very slightly included grade one. diamonds of VVS1 clarity have exceptionally small inclusions that are very difficult to see under 10x magnification. At 30x magnification the inclusions will be barely perceptible. Only a flawless or internally flawless diamond will have a higher clarity grade.