I'm wondering whats the point of the valuable gems? Vertex, berubian etc, no-one seems interested in them, so doesn't that then make them worthless rather than valuable?
Or will there be a use for them soon, maybe an alternative to nova crystals?
How come only 1 type of gem can be used for lightsabres? If I remember correctly isn't the colour of a light sabre's blade dependent on what type of crystal is used?
Probably a case of them being introduced ages ago with the intention of using them for something, and then either being sidetracked or the intended use was removed. Likely they will be used for something in the future, but thats up to the admins.
As for the lightsaber crystals, that was just the choice when they were doign the lightsabers. I think they may be looking at using the other one to upgrade them or something.