Among the properties used to identify minerals, we can mention the breaking tendency: cleavage or fracture. The two minerals shown that exhibit fracture as a dominant form of breakage are quartz and olivine.
Many properties of minerals are used to identify them, such as color, density, hardness, among others. In this case, we are talking about their breaking tendency.
How do minerals break?
Minerals can cleave or fracture, which depends on how the sides separate and the formed angles.
A type of mineral breaks always in the same, and this is why the breaking tendency is useful to identify them.
Cleavage
- The mineral breaks in flat smooth planes.
- Cleavage direction and smoothness of surfaces are significant when identifying.
Fracture
- The mineral break in irregular planes.
- In these minerals, there is no particular breaking direction.
Image analysis
According to this information, we can analyze the images and look for the answer.
Let us take, for instance, the potassium feldspat option. It shows flat and regular planes. So this is not a fracture, but a cleavage.
On the other side, quartz and olivine, do not seem to show any regular breaking side. The shape of these minerals is not well-defined and does not show any breaking direction.
The two minerals shown that exhibit fracture as a dominant form of breakage are quartz and olivine.
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