Coal does not have much cleavage, at least most sides. Since most coal basially has the same atomic structure (of it even is the same type of coal), I'd say coal has poor cleavage, but my answer is not guaranteed.
-Lazia Marcuss
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Cobalt has a cleavage in three directions, forming a cube.
Cleavage is smooth; Fracture is rough. Cleavage splits along flat surfaces; Fracture splits along jagged surfaces. Cleavage is Cleavage; Fracture is Fracture
Cleavage refers to the tendency of a mineral to break along flat surfaces. Graphite and mica have the same type of cleavage, which is a perfect basal cleavage.
Bituminous coal is described as:Diaphaneity (Transparency): OpaqueColour: BlackStreak: BlackCleavage: None ObservedSee PicturesBituminous Coal exists in the geological area known as The Pittsburgh Coal Seam-- an area extending from Western Pennsylvania, Western West Virginia, Ohio, Kentucky, and Indiana. Though mined since the days of Native American Indians, and heavily mined since 1800, it is estimated there is still enough coal in this large seam to last millions of years.
The cleavage of gold may vary do to the type
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.
imperfect cleavage