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The mineral cleavage is made up of many other particles to form a rock when the rock cleavage is just a rock.
Conglomerate does not exhibit cleavage--it fractures.
Cobalt has perfect cleavage in all directions.
I dont think so because a rock can not have cleavage, but a mineral can
Because bauxite is a rock, a mixture of minerals, it has no cleavage of its own.