Basalt does not have cleavage, it has fracture.
Halite typically displays cleavage along three planes at right angles to each other. However, if halite is subjected to mechanical stress, it can also exhibit a conchoidal fracture pattern due to its brittle nature.
cleavage....
Dolomite typically exhibits three cleavage planes that intersect at approximately 90 degrees, resulting in rhombohedral cleavage.
It has both. It's cleavage is perfect, and it's fracture is sub-conchoidal.
Muscovite has perfect basal cleavage, or book cleavage.
Halite typically displays cleavage along three planes at right angles to each other. However, if halite is subjected to mechanical stress, it can also exhibit a conchoidal fracture pattern due to its brittle nature.
Sulfur's cleavage is imperfect.
flood basalts and volcanoes
A factor that determines crystal size in igneous rocks is the speed in which the lava/ magma crystallised or froze. As pillow basalts form at mid ocean ridges where magma is erupted into direct contact with the cold sea water the crystals form very fast and are therefore small. Other basalts erupted on land still have relatively small crystals and crystallised relatively fast but overall slower then pillow basalts.
cleavage....
it has no cleavage
imperfect cleavage
it has no cleavage
What cleavage does pyrite have
cleavage
basalts
flood basalts and volcanoes