Estate Tanzanite And Dome Diamond Ring 14K White GoldEstate 14K White Gold Tanzanite and Diamond Dome Ring. This ladies dome style ring from our estate collection features 34 round diamonds equalling . 25cttw, and a 5x7 oval tanzanite center stone. The 5x7 center oval tanzanite is surrounded by 16 round diamonds, 6 if which are contained in the split bowtie on the East and West sides of the tanzanite 10 in the rest of the surrounding halo North and South of the center tanzanite. There are 9 diamonds on