Used in reference to energy centers or entities themselves. As Ra describes it, when a crystalline structure is formed of physical material, the elements present in each molecule are bonded in a regularized fashion with the elements in each other molecule. Thus the structure is regular and, when fully and perfectly crystallized, has certain properties. It will not splinter or break; it is very strong without effort; and it is radiant, traducing light into a beautiful refraction giving pleasure of the eye to many. Through consistent work in consciousness over a period of time (aka: the “discipline of the personality”), energy centers themselves become crystalline, forming unique crystal structures described in 51.8.