Ladies' 14k white gold tanzanite ring by Christopher Michael, with one blue violet exceptional color, GIA Type I Clarity VS , emerald cut tanzanite. The tanzanite weighs 4.73 carats, measures 8.5 mm wide by 10.7 mm long by 5.9 mm deep, and is 4 prong set. In addition, there are six prong set ideal round brilliant cut diamonds, F-G color, SI1 clarity, with a total weight of .10 carat. The ring weighs 6 grams. Tanzanite is enhanced by heating.