Well cut, with lots of blue sparkle, this totally clean stone would run about $4,000 if it were a natural Kachanaburi Royal Blue Sapphire... and yes, the color is THAT good.

 Totally gorgeous, and fraction of what real ones would cost -- but you pretty much have to be a jeweler to tell the difference.

An Oval Basket setting lets the Sapphire do it's thing!  The stone weighs a healthy 6 carats and the Sterling silver mounting is what you'd expect to hold such a nice stone.  Just look at the pictures at how thick the metal is.