detailed review for a pretty good stone
I agree with every word "Marthasjacob" said. The polish lines for the center facet is noticeable when it catches the light at certain angles. This may bother some while others may not care to notice. The video for this round cut shows exactly what you will get. The color will be:
ocean blue like the video in indirect natural day light, pale blue accents when the sun or non-florescent light hits it but a striking cobalt blue glow from the side view and even sometimes a purple-blue in natural evening light
Another fyi is even though this is a "brilliant cut", the DN round sapphire actually has less facets at the pointed end (see the video above) than diamonds so the sapphire will not sparkle as much as some other sapphires you have seen. It's still pretty thought.
When you get the store, go compare to the lab created ones at your local mart since they are usually inexpensive as well. Make sure you see both under the same light and you might find you like one better.