That suit of schist contans a large number of abundant aluminiummineral: staurolite, almandine and biotite, so the primitive is mostly clayrock.
该套片岩主要由富铝矿物十字石、铁铝榴石和大量黑云母组成，因而其原岩以粘土岩为主。
2
Yunnan Province is rich in aluminiummineral resources. Main minerals products can be divided into two types. That is, sedimentary bauxite and nepheline syenite.
云南的铝矿资源丰富，主要矿产分为沉积型铝土矿和霞石正长岩铝资源两大类。
3
Because aluminium is different from nonmetallic mineral, its crush corresponds with milling's generality and specialty.