Which minerals are more likely to break rather than flow?

Feldspars and garnets are classified as brittle minerals, which means they tend to break or fracture rather than flow when subjected to stress. This characteristic is largely due to their crystalline structure. When pressure is applied to brittle materials, they reach their breaking point without undergoing significant deformation or flow. Feldspar, for instance, has a strong crystal lattice structure, making it resistant to flow and causing it to fracture under strain. Garnets, similarly, possess a rigid crystal form that contributes to their brittleness. This behavior contrasts with other minerals listed in the other options, which may exhibit more ductility or plasticity under stress, allowing them to deform rather than fracture.