Out of all the blue stones you can get, I'm thinking the best is still the awesome blue that you get in Blue Sapphire.  The thing is, a natural stone this clear and with this color would set you back $5-6,000.  I don't have that kind of money, and I'm guessing you don't either.

This stone is a deep blue Created Sapphire!!! This 6 carat stone is what sapphire's are all about -- Well cut, lot's of intense blue sparkle, clear and clean! Just look at those pictures, 'cause as good as they look there, they look better when you get 'em on.  I'm selling a lot of sets of this stone because the color is so good!

This bracelet boasts 17 of them, measuring 10x8mm each, giving you a total weight of somewhere between 50-55 carats.