Kaevan Highwit

Kaevan Highwit is a blood elven vendor of jewelcrafting patterns found in Warspear's Gem Boutique.

Quotes
The draenei crystalsmiths closely guard the secrets to harnessing the latent power of the gems of Draenor.

I, however, have managed to access these secrets and can share them with a talented jewelcrafter.

For a price, of course.