Buy it here →One 2.79 carats oval tanzanite, blue violet vivid (40%blue/60%violet) color, VS1 clarity, cut grade very good, measuring 7 mm wide, 8.9 mm long, 5.9 mm deep; with very good polish and very good symmetry. The overall quality rating of this tanzanite is 913 out of 1000. Tanzanite is color enhanced by heating..