Supply mica mica mica mica mica 
 Supply mica mica mica mica mica 
 Supply mica mica mica mica mica 
 Supply mica mica mica mica mica 
 Supply mica mica mica mica mica 
 Mica, a silicate mineral, with continuous layered silicate structure. Divided into three subcategories: muscovite, biotite and lepidolite. Muscovite muscovite and its subspecies (sericite) and rare paragonite; biotite, including phlogopite, biotite, iron biotite and manganese biotite; lithium mica is rich in lithium oxide, mica small scales. Industry, especially in the electrical industry, muscovite and phlogopite. Muscovite chemical formula KAl2 the [AlSi3O10] [OH] 2, which SiO2 45.2%, Al2O3, 38.5% and K2O 11.8%, H2O, 4.5%, with a small amount of Na Ca and Mg, Ti and Cr, Mn and Fe and F and so on. Chemical formula of phlogopite KMg3 [AlSi3O10] [the F, of OH] 2 which of K2O 7 ~ 10.3%, of MgO is 21.4 ~ 29.4%, of Al2O3 for 10.8 ~ 17%, of SiO2 for 38.7 ~ 45%, H2O, is 0.3 ~ 4.5% containing a small amount of Fe, Ti, Mn, Na and F, and other. a crystal, crystal mica mostly monoclinic system was stacked plate or books like crystal development is complete for the diamond or hexagon with six crystal surface, sometimes forming a fake six-party columnar crystal. b, cleavage, play as or pressure as the mica has perfect cleavage, you can peel points. Theoretically muscovite stripping is divided into 10 or so, phlogopite can be stripped into thin slices of about 5 or 10. Cleavage of mica crystals concealed, is to play as and press like. c, color, luster and transparency of muscovite flakes generally colorless and transparent, but often stained green, brown, yellow and pink colors; glass luster, cleavage appear pearly luster. Phlogopite was usually yellow, brown, dark brown or black; glass luster, cleavage appear pearl or semi-metallic luster. The muscovite transparency of 71.7 ~ 87.5%, the phlogopite 0 to 25.2%. d, the hardness and elastic