this is best for a red/nin....soloing stuff..where you use dagger to try and hit mob with least amount of damage to avoid giving mob tp..let enspells do all damage.and evasion always a plus.
If it follows the pattern of the other earrings, the recipe would be Wind Crystal + 2x Orichalcum Ingot. I cannot confirm this myself.
The REALLY interesting question, is what kind of stuff can we make out of it? Any high level goldsmiths wanna try Earth crystal + Black Bead + Orichalcum Earring? Just a hunch.