The minerals of metamorphic rocks depend on the chemical composition of the original rocks. The table below gives the mineral association with different metamorphic rock groups.
| Original Rock | Original Mineral Composition | Metamorphic Mineral Composition |
| Igneous rocks | olivine, pyroxene, amphibole, quartz, feldspar, mica | quartz, feldspar, amphibole, chlorite, garnet, mica |
| Sedimentary Rocks: | ||
| Carbonates | calcite, dolomite | calcite, dolomite |
| Shales | quartz, clay | quartz, mica, garnet, andalusite, silliminite, kyanite |
| Sandstones | quartz | quartz |
The only minerals of concern to aggregate durability are the sheet silicates which may may be concentrated into schistose bands, or result in platy rock, such as slate. The parallel orientation of mica in these produces a weak direction which may cause splitting of the aggregate particles, and/or may produce a particle with long or platy dimensions.
