Pretty ring! How much is it bi-colour though because in the photos it just looks a rich blue (which is lovely all by itself)!
A word of caution, I can't see the sides of the ring but unless the Tanzanite is very protected, be careful if you wear it between other rings because it will abrade over time. Unfortunately I know of many horror stories where Tanzanite has been ruined with constant wear or abrasions. I ruined one years ago and never forgot it but would hate for that to happen to you as you clearly love it. Sorry if you know all this already but I sometimes think Tanzanite should come with a Government Health Warning on the box!!!!!
Enjoy your lovely new ring.