1、 Common species

Metamorphic rocks refer to those rocks that are metamorphosed due to the forces inside the earth. It has many kinds, including slate, schist, phyllite, marble, quartzite and so on. In addition to them, there are some less common ones, such as gneiss, mylonite, andalusite breccia, skarn and so on

2、 Introduction to typical metamorphic rocks

1. Slate: it is some argillaceous or silty rocks, which are formed by metamorphism. It can be easily cut along the direction of the plate pattern. It has many advantages, such as durability, anti-skid and so on

2. Schist: it is a kind of coarse-grained metamorphic rock, which is composed of some fiber minerals arranged in parallel. It is relatively light and has low strength. It is also easily weathered or cracked by frost

3. Marble: it is a kind of rock that contains carbonate and becomes after metamorphism. It has beautiful stripes and good hardness. It is suitable for architectural decoration. However, it is not resistant to strong acid corrosion

4. Quartzite: it is the rock formed after metamorphism of quartz and some other siliceous rocks. It has extremely high hardness, is not easy to like water, and has beautiful lines. It is an important raw material for metallurgy, chemical industry and other industries