18K White Gold Oval Tanzanite and Diamond Ring – East to West Setting, Size 8.5This striking 18K white gold ring features an 8 x 6. 5 mm oval tanzanite set horizontally (east to west) for a modern and unique look. The richly saturated violet blue tanzanite displays beautiful pleochroism, shifting between shades of blue and purple depending on the light. Three sparkling diamonds accent each side of the center stone, totaling 0. 30 carats and adding brilliance that enhances the overall elegance of the design. Perfect as a bold