[[Mineral]] [[crystals]] come in a seemingly infinite range of shapes. But behind this tremendous diversity of form there is a strict order, because crystals always grow according to simple [[mathematics|mathematical]] laws. By stydying the [[crystal geometry]], [[crystallography|crystallographers]] can fit any crystal into one of only six basic crystal systems. These are called [[Isometric (or Cubic) System|isometric]], [[Tetragonal System|tetragonal]], [[Hexagonal (or Trigonal) System|hexagonal]], [[Orthohombic System|orthorhombic]], [[Monoclinic System|monoclinic]], and [[Triclinic System|triclinic]]. Chesterman, p. 33
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#REDIRECT [[Crystal system]]
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=Sources=
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*Chesterman, Charles W. ''The Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf: New York (1987)