The presence of an inclusion contributes to the natural diamond color. A blue diamond is rare to find though; most of such gemstones are mined from facilities situated in Australia, South Africa, and to an extent from India. Usually, most of the blue diamonds have a tint of gray in it. However, an ideal blue diamond includes ‘excellent’ cut grade and I1 or more clarity grade, as the blue hue conceals birthmarks or inclusions of the gemstone.
Since it is rare, a blue diamond is expensive than a white diamond, although it is not as pricey as some of the other colored gemstones are. Eventually, the price of a blue diamond ring depends on its cut and clarity grade. An engagement ring with light blue hue diamond may come at a lesser price tag to one featuring the same carat weight, but an intense tint of blue.