Color Change Oval Tanzanite Gemstone 3.63 CaratsA color change oval shaped Tanzanite gemstone with a "good" grade cut and color change violet color in dincandescent light to blue in daylight. One 3. 63 carats oval tanzanite, color change violet in incandescent light to blue in daylight , 10X LOUPE CLEAN clarity, cut grade good, measuring 8. 8 mm wide, 10. 8 mm long, 5. 3 mm deep; with very good polish and good symmetry. The proportions of the tanzanite are as follows: total depth 60%. Tanzanites