For everyday wear and special occasions, these natural american blue sapphire™ and diamond stud earrings strike the perfect balance of color and sparkle. 10k yellow gold a light indigo round-cut montana blue sapphire shines at the center of each stud a flower-shaped halo of pavé-set round-cut diamonds surrounds the gemstone total diamond weight is 1/10 carat friction backs from the natural precious gemstones by kay collection