This detailed star medallion pendant with blue sapphire and lab-grown diamonds is your new cosmic style essential. Sterling silver with 18k yellow gold plate 2. 0mm blue sapphire center stone certified lab-grown diamonds; f color/vs2 clarity with certification card 1/8 ct. T. W. Of lab-grown diamonds 18. 0-inch cable chain; spring-ring clasp from the whimly by zales collection, available exclusively at zales