Buy it here →”Titanic” One 33.33 carats heart-shape brilliant tanzanite, violet blue exceptional (15%/85%) more blue color, VS1 clarity, cut grade very good, measuring 20.2 mm wide, 19.5 mm long, 12.8 mm deep; with very good polish and very good symmetry. The proportions of the tanzanite are as follows: total depth 63.4%, table width 56.3%. The overall quality rating of this tanzanite is 972 out of 1000. Tanzanite is color enhanced by heating.