I have this on Five 3.0 like Dann, and I have to say it is truly beautiful, and looks really impressive when the sun is shining brightly. If you want to get looks, this should do the trick.

Just got the so-called Crystal Blue Five 3.0. But the frame is actually the Liquid Jewel that's used on the dragon optical sunglasses. Still a vibrant glowing frame color than you can't help but notice. Even when you're wearing it.

Another one of the Retro colours that has appeared on various styles throughout the years.
A nice one.

very nice looking frame colour, just got this on the fours and I deffinately rate up there with the best crystal colours. its such a nice bright blue that it will look awesome in the sun, shame about the lens it comes with.

Great frame color. You can see how the lenses lock into the frame and all. Oakley needs to bring Crystal frames back to the M Frame line.