Tanzanite & Diamond Ring 14kt Yellow Gold. This is a beautiful ladies ring set with a tanzanite and diamonds in 14kt yellow gold. The ring is set with an oval cut tanzanite, medium-dark, moderately strong, Violet in color, weighing approximately 0.51cts and two round cut diamonds (0.04cttw). The ring is in excellent condition with the ring size: 7 1/2. It is hallmarked: 14kt and includes an insurance appraisal of $550.00.