Perfect in three directions.
Sphalerite
cleavage....
no because fluorite is softer than a penny
fluorite
There is no such ion as the fluorite ion. However fluorite the mineral is CaF2. The questioner alost certainly meant Hydrogen Fluoride and that is HF.
Yes; Fluorite has cleavage; it breaks along flat surfaces in three directions.
It has both: uneven fracture, and perfect cleavage in three directions.
I think that the breakage of fluorite would be cleavage because it is cut in a direct way.
Calcite has excellent cleavage in 3 directions, although they are not at 90 degrees. It can form prisms, rhombohedrons, or scalenohedrons that break into rhombohedrons.
Sphalerite
This is termed fracture, eg. the conchoidal fracture of obsidian. Breaking into pieces with straight lines and flat faces is called cleavage; minerals like calcite and fluorite exhibit excellent cleavage.
Minerals can have a cleavage plane, multiple cleavage planes, or no cleavage plane. A cleavage plane is an area of weakness in the crystalline structure where the mineral is prone to splitting.
Fluorite is a mineral.
it is made out of fluorite
its is a rock
Fluorite is a mineral consisting of cubic crystals of calcium fluorite.
Fluorite forms cubic crystals.