the term for the characteristic external shapes of crystals due to the number, shape, size , and orientation of the crystal faces. The extent to which perfect habit may be approached depends upon conditions during formation, speed of growth, impurities etc. Individual crystals of particular minerals may show typical growths. Habits include tabular (flat blades), fibrous ( like thin fibres), prismatic (elongated) and acicular (needle-shaped).
Taken from Dictionary of Science
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