Silvertone December Imitation Birthstone Ring - Blue CZ Celebrate life with a Sterling Silver Imitation Birthstone Ring! Imitation Birthstone rings are the perfect way to gift someone something special on their birthday. This December blue CZ ring features a 2 carat round cut stone that is surrounded by petite size clear stones giving off the angelic halo effect. Smaller size CZs extend partially down each side of the band for even more radiance. Sparkle in style during your birth month or all year longThis ring is perfect to wear anytime!