Mica Sheet, Muscovite, Black Mica
Apr 05, 2008
Mica:
Mica main crystallization monoclinic crystal was thin at the six-party Flake, Flake, tabular and sometimes six-party column was false. Hardness 2 -3, the proportion of 2.70-3.20. Mica of refractive index increased iron content and.....
The North Mineral Factory