User:Rygel, M.C./Geoimages

Mineral Properties

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  Single cleavage plane
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  Biotite mica breaking into thin sheets along a single cleavage plane.
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  Biotite mica (black) breaking into thin sheets along a single cleavage plane within a hexagonal crystal.
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  Muscovite mica (golden) breaking into thin sheets along a single cleavage plane.
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  Two cleavage planes at right angles
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  Potassium feldspar has two cleavage directions that are at right angles to each other.
• Potassium feldspar has two cleavage directions that are at right angles to each other.
  Potassium feldspar has two cleavage directions that are at right angles to each other.
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  Plagioclase feldspar has two cleavage directions that are at right angles to each other.
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  Plagioclase feldspar has two cleavage directions that are at right angles to each other.
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  Two cleavage planes not at right angles
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  Kyanite has two cleavage directions that are not at right angles to each other.
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  Hornblende has two cleavage directions that are not at right angles to each other (they are at 56 and 124 degrees).
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  Hornblende has two cleavage directions that are not at right angles to each other (they are at 56 and 124 degrees).
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  Three cleavage planes at right angles
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  Halite has three cleavage directions at right angles to each other.
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  Halite has three cleavage directions at right angles to each other.
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  Galena has three cleavage directions at right angles to each other.
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  Three cleavage planes not at right angles
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  Calcite commonly forms rhombohedrons formed by three cleavage planes not at right angles to one another.
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  Prismatic calcite crystal (left) and rhombohedral calcite crystal (right).
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  Calcite (left) and halite (right), both of which have three cleavage directions.
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  Four cleavage planes
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  Six cleavage planes