Ships within 1 day. Stunning, elegant 1/3 cttw Blue Diamond Solitaire Ring 10K White Gold. The sparkling natural diamonds are 1/3 cttw. A gift box is included with purchase of this ring. Stone Type - Natural Blue Diamond. Metal Type - 10K White Gold. Diamond Carat Weight - 1/3 cttw (0.33 cttw) 1/3 cttw (0.33 cttw) Blue Diamond Solitaire Ring 10K White Gold.5. Vir Jewels 10K White Gold Engagement Ring For Female Adult. Birthstone Month - April.