Earstuds Rose Hearts Material: 925 sterling silver Stones: rose lab-grown diamonds Cut: heart Stone size: 10 mm (1 cm) Backing: secure Alpa locking system Warranty: lifetime guarantee Category: premium Romance, refined. These Heart-Cut Diamond Studs are a bold yet elegant expression of love, featuring dazzling 1 cm heart-shaped lab-grown diamonds set in polished 925 sterling silver. Designed with the advanced Alpa locking system for maximum comfort and security. A timeless gift - or personal treasure - backed by a lifetime guarantee.