Uncover the Astra Lab Sapphire and Diamond Halo Round Cut Necklace, with a truly impressive 3.50ct lab grown sapphire encased within a halo of 0.20CT of H/SI quality diamonds, all set within the finest sterling silver. The halo of diamonds expertly placed around the main stone cause it to catch the light with every movement of the wearer, making this a beautiful gift, a treasured occasion piece, or an everyday statement. When shopping with The Diamond Store, benefit from free worldwide delivery, beautiful packaging and a 5-year guarantee.