What is the best grade of ruby?

The best grade of ruby is determined by a range of factors. The Four Cs of selecting the perfect diamond, which are color, clarity, cut and carat, also apply to rubies. According to the Gemological Institute of America, the color of the July birthstone should be a vibrant to slightly purplish red, and that the stone should be clear and inclusion free. Accordingly, the cut should show off its color and clarity. As for the last criterion, fine rubies more than a carat in weight are rare. Often, large rubies are more expensive than diamonds of comparable weights. Professionals recommend that you consult with a jeweler or gemologist in order to best determine which ruby will meet your needs as well as align with your budget. Find an assortment of ruby jewelry on 1stDibs.