Can you provide examples that illustrate the differences between cleavage and fracture in minerals?

Cleavage in minerals refers to the way they break along planes of weakness, resulting in smooth and flat surfaces. For example, mica exhibits perfect cleavage, breaking into thin, flexible sheets. On the other hand, fracture in minerals refers to irregular or rough breaks that do not follow specific planes. For instance, quartz displays conchoidal fracture, breaking with curved, shell-like surfaces.