Black Marketeer of Mammon:
Let's see. I need the power of the wind, which I could probably get...and I also need the power of darkness. That would be Dark Fragments.
Quite unique materials, huh? I need all 6 Attributes to make this gem. In order to collect Dark Fragments, go to the Altar of Evil. Get 50 Dark Fragments from Arbitors of Darkness, Altar of Evil Spirit Offering Boxes, Mutated Cerberuses, Dartanions, Insane Phions, Dimensional Rifters, and Hellgate Fighting Dogs.
(The Altar of Evil is in the Fog of Blood Region near the Dark Elf Village.)