"Nourished Nether" mod has soul particles coming out of blue quarts and it looks awesome, I think you should add something like that to this mod, maybe those souls comming out of normal white quarts block

Will o' Wisps are already a thing, and I don't really think quartz ghosts would make sense? Soul particles for this mod makes sense, since this special quartz seems to be in soul soil, but nether quartz is just quartz.

Also, I'd rather avoid adding something that's exactly the same as another mod.