This property is called cleavage.
Many minerals have "cleavage" that causes them to split on flat cleavage planes. Such minerals include micas (muscovite, biotite. phlogopite), calcite, gypsum, and feldspars. Cleavage is the result of the minerals' crystal structure that has weaker chemical bonds aligned in planes.
Some friction will occur with seemingly smooth surfaces because at a molecular level, nothing is smooth.
cleavage, if a natural property of the mineral (e.g. mica); or a fault, such as in a gemstone.
Cleavage
Any smooth, hard surface can be glued by Super Glue.
Cleavage
Cleavage
The special property that magnetite displays is that it is attracted by a magnet. Cleavage is the mineral property that explains why some minerals break along smooth, flat surfaces.
cleavage
Tiny collisions on the surfaces, called microwelds, cause friction.
Many minerals have "cleavage" that causes them to split on flat cleavage planes. Such minerals include micas (muscovite, biotite. phlogopite), calcite, gypsum, and feldspars. Cleavage is the result of the minerals' crystal structure that has weaker chemical bonds aligned in planes.
The most common mineral group contains silicate minerals.
It tells you that that mineral is smooth and flat ,and so are the chemical bonds. Because if it didn't it would be a fracture which means it is jagged and not smooth. I am sure of this answer because cleavage means physical property of some minerals that cause them to break along smooth, flat surfaces.
conchoidal fracture
smooth surface
Feldspar
smooth surfaces