Istakhr, my imperial main learned the pattern to Advanced Magenta Vehemence Crystal (+16 power, usuable by levels 31 and higher). This is the pink light saber crystal. Note, this is not the lvl 50 version that requires a rather complex series of steps to just get a gem.
Components:
4 Ice-Jewel
4 Sunblaze
1 Pristine Adegan Crystal
4 Ancient Artifact Fragment
The Adegan crystal is the complicated part, they are farmed on a random, two hour timer in three locations on Alderaan, and then refined by a 400 artificer on Korriban into the prisine ones needed for the final crystal.
If you would like a pink color crystal, send the mats and a Rough Magenta Crystal Shard (I do believe that they are boe, if not post here, but I did not see anything on them saying otherwise) and I will gladly create one of these pink crystals for you, at no charge. And remember, if you have Legacy, these crystals can be mailed between your faction's toons.
Happy hunting.