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Best Answer: here are some...meaning: Cleavage in general refers to a division or separation of form. Its usage is heavily dependent on cultural context, where it may refer to: Cleavage (crystal), in mineralogy and materials science, is a process of splitting a single crystal. Cleavage (geology), Foliation perpendicular to stress as a result of ductile deformation. e.g. shales (shists) Cleavage (embryo), in embryology, is the division of cells in the early embryo. Cleavage (fiber), in optical fibers.
When you describe cleavages you will need to include both the number of cleavage directions and the angles between those cleavage directions. Examples of different types of cleavage follow. gypsum and biotite. 1) When a mineral has only one direction of cleavage it often occurs as flat plates or sheets. feldspar. 1) The two directions are parallel to the base of the specimen and vertical, such as the plane running along the left side.