Blue diamonds are simply stunning. Symbolic of opulence, these wonderful stones carry a color that is as rare as hen’s teeth, among diamonds that is. Few jewelers sell them, which is why lots of people tend to jump at the smallest chance to buy a 3 carat blue diamond ring. Color This is the most important thing to watch while buying. You get several shades of blue with the saturation, hue, and tone deciding the quality of the stone. There may be secondary hues present, such as green or grey. Clarity Clarity does not play as heavy a role here as with white diamonds – any inclusion would be very much harder to see. Still, the inclusions, the more the stone will be valued at. Cut Cut as well matters less with blue diamonds than it does with white diamonds, although most jewelers recommended keeping brilliance and fire in mind while picking out a stone. Carat This aspect of a stone is very important. The more its carat weight, the higher priced a blue diamond will likely be.