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cleavage: Imperfect, when it splits the stone doesn't break in a regular pattern each time. fracture:conchoidal,when it shatters the pieces have smooth surfaces,uneven brittle.
cleavage....
Galena's cleavage is cubic.
Sulfur's cleavage is imperfect.
Silvers Cleavage Is Silver Doesn't Split .
Cobalt has a cleavage in three directions, forming a cube.
no cleavage
Show cleavage? What Cleavage? Not really
Muscovite has perfect basal cleavage, or book cleavage.
cleavage
Aluminum does not display the characteristics of cleavage.
sulfur does not have cleavage.