Yes yes, we know that. <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" /> I just mentioning that book on charms you find every now and then where the mage-writer describes what exactly they are. Far as the player can tell, we don't just by looking if they're 2D, 3D, or what. The book kind of illuminates some issues. "Ah ha, they are stones! Now I know."