Searched " Chaotic Skyfire Diamond " and found nothing under this, 1st post so bare w/ me if this is a repost.
In patch 2.3 the design for Chaotic Skyfire Diamond was released.
Apparently it's bugged, and instead of being BoP drop only for JC's, it's a BoE drop that only JC's can see and can be looted multiple times.
It drops off the Coilskar Siren in Northern Shadowmoon Valley.
Managed to find 2 in about an hour and a half of farming, sold one for 500, and another for 450. But these prices are from my server so it could possibly be more or less on yours.
Try not to actually learn the recipe, because some people say they can no longer get it to drop and this is coming from people who have actually learned it.
Good luck, and hopefully my 1st contribution is a good one for some ;P