Crystals have an inner skeleton a lattice structure, making them compact and uniform. There are 7 basic structure and 32 sub-variations.
The Cubic or Isometric corresponds to The Old
The Tetragonal corresponds to Mature Woman
The Orthorhombic corresponds to Mature Man
The Monoclinic corresponds to Master
The Triclinic corresponds to Young Girl
The Trigonal or Rhombohedral corresponds to Young Boy
The Hexagonal corresponds to The Child
NON-Crystaline:
Holonity 