* Marble: Marble is a metamorphic rock formed from limestone. During metamorphism, the calcite crystals in limestone recrystallize and interlock, forming a dense, non-layered structure.

* Quartzite: Quartzite is a metamorphic rock formed from sandstone. The intense heat and pressure of metamorphism cause the quartz grains in sandstone to fuse together, creating a very hard, non-layered rock.

Foliation is the development of layers or bands in metamorphic rocks due to the alignment of minerals under pressure. This is common in rocks like slate, schist, and gneiss.

In contrast, marble and quartzite lack this distinct layering due to the way their constituent minerals recrystallize and interlock during metamorphism.