| 1. | Dickite has perfect cleavage in the ( 001 ) direction.
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| 2. | It has a vitreous luster and perfect cleavage on [ 1011 ].
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| 3. | It is this layering which causes kampfite's one perfect cleavage.
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| 4. | Its crystals are small tetragonal tablets with vitreous luster and perfect cleavage.
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| 5. | Zussmanite occurs as pale green crystals with perfect cleavage.
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| 6. | It exhibits perfect cleavage and a brittle fracture.
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| 7. | Geigerite s crystal system is triclinic with perfect cleavage on the { 010 }.
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| 8. | It has one plane of perfect cleavage.
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| 9. | Cymrite, with perfect cleavage and a monoclinic crystalline system, falls in the silicate group.
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| 10. | It displays a perfect cleavage on ( 010 ), it is brittle and has a conchoidal fracture.
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