I do like that idea very much. They are in tune with the Force even moreso than some Force-users can be and both work in mysterious ways.

I have heard there is a way to purge them of their bleeding and purify the crystals again but I don't know if it is merely a myth or not.

[It's been a long time since any Dark-aligned user would have found a reason to do so and Jedi don't come across crystals that have been bled all that often.]