is the way a mineral grows or how it is shaped/ the way it looks
when growth is unimpeded. Under ideal conditions, minerals tend to grow with relatively
smooth, exterior plane surfaces, and that is what we call the crystal face.
how the mineral breaks along a plane of atomic weakness. When you think of
cleavage remember that it is produced when the mineral is BROKEN.
seemingly random pattern along curved or irregular surfaces.
the ability of a mineral to resist being scratched. This is measured by Mohs
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