Of course you can get a purple crystal.
1. Buy it from GTN some on your server bound to have the schematic
2. Defeat SOA or KARAGGA on hardmode. I think the purple is in all Columi Mainhand weapons.
well I will never probably get into a HM Operation, and I levelled artifice on my char to just get this purple crystal thingy.
Is it still possible to obtain the schematic from the belsavis world boss?