Ships within 1 day. Lovely black diamond heart ring in .925 sterling silver with rhodium. The sparkling natural 1 cttw round black diamonds are heat treated. The width of the ring is 12 mm. The ring is made of 73 diamonds set in prong setting. The ring is available in multiple sizes. Gift box is included with purchase of this ring. Stone Type - Natural Black Diamond. Metal - 925 Sterling Silver. Number of Diamonds - 73. Diamond Cut - Round. Total Diamond Carat Weight - 1 cttw. Diamond Clarity - I1-I2. Vir Jewels Sterling Silver Statement Ring For Female Adult. Birthstone Month - April. Black diamonds have been heat treated to improve their appearance or durability.