Imagine yourself wearing these checkerboard cushion-cut blue lab-created sapphire solitaire stud earrings, a vibrant addition to your jewelry wardrobe. Fashioned in sterling silver each earring simply glistens with a 7. 0mm checkerboard cushion-cut bright blue lab-created sapphire solitaire. Blue sapphire is the traditional birthstone for september and symbolizes truth, sincerity and commitment. These post earrings secure comfortably with friction backs.