Color
The finest diamonds are colorless, rare and expensive. On the GIA grading scale below, D-F are considered colorless, G-I near colorless and any grade J or below shows an increasingly yellowish tinge. Beyond the preference for a whiter stone, however, the color of a diamond does not affect its brightness or sparkle.
Fast Fact: Most experts agree that, when mounted, diamonds in the "G-H" range appear colorless and represent a much better value than "D-F"stones which command significantly higher prices.