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If bent by an external force, a plastic mineral will not spring back to its original shape and size when the stress, that is, the external force, is released. It stays bent.
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The mineral may be drawn into a wire. Ductile materials have to be malleable as well as
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May be cut smoothly with a knife. Relatively few minerals are
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164:Introduction to mineralogy
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134:Plasticity
120:Elasticity
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100:Sectility
94:Sectility
82:Ductility
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