The main minerals of bauxite clinker are diaspore and high alumina silica. The content of diaspore increases with the increase of the ratio of Al2O3 to SiO2. The secondary minerals are rutile, jieiron ore, etc. Sometimes it also contains a small amount of bauxite and dickite. According to the content of bauxite, it can be divided into three grades and five grades. The content and color of bauxite are as follows:
Over 85% of the first-class super grade soil gray or dark gray
Grade I 75-85% earthy grey or dark grey
Secondary secondary 65-75% white gray
Third class, third class, 50-65% cyan gray
Grade IV below 50% cyan gray
      Bauxite clinker is a sedimentary deposit, which can be divided into two types, i.e. the source ore and the vein ore. Turquoise, covered with hard red clay, accompanied by limestone thick soil layer, people call it "granulated ginger stone". The ore body is layered with a large area and can be several miles long along the strike. The thickness of the ore body is generally 3-4 meters, and the  thickness of the ore body can be more than 7-9 meters. The material is pure and the structure is hard and dense. The vein mine is covered by limestone, with a small area and a nest like output. Generally, it is a nest of tens of meters to tens of meters, sometimes mixed with limestone, with a layer of fine red clay in the middle. The material is coarse and not very pure.