This mod seems to be causing a texture memory leak, though I don't know if it's a conflict with another mod or not. In one instance, it caused an instant shutdown of a rented server after only a few minutes. In another it caused a desynching memory leak in single player only after ~5 hours (probably number of chunks created?) I know it's Ore Crystals as that's the only mod removed to clear the issue in both instances. Neither actually caused a crash to report, unfortunately, and the texture memory leak report doesn't specify the mod. This is the list of mods I have installed, in case it helps find a conflicting mod.
Modlist 1.txt