Sterling Silver Tanzanite and Created White Sapphire Halo Stud Earrings Crafted from sterling silver these gorgeous 4mm round 0.73cttw tanzanite haloed with 32 round 1.2mm 0.25cctw created white sapphire studs. Prongs set in 1g 925 sterling silver with friction post backing, these studs are indeed the best gift for valentine's day, birthday, engagement, wedding, anniversary and other occasions. Imported