Send birthday wishes with these modern oval blue lab-created sapphire and lab-grown diamond earrings. Sterling silver bezel-set 6. 0 x 4. 0mm oval-shaped blue lab-created sapphires bezel-set lab-grown diamonds lab-grown diamonds; f color/vs2 clarity 1/20 ct. T. W. Of lab-grown diamonds friction backs sapphire is the traditional birthstone for september