Where is Biotite found in the world?
List every Biotite, a common phyllosilicate mineral within the mica group, with the approximate chemical formula K3AlSi3O102. More generally, it refers to the dark mica series, primarily a solid-solution series between the iron-endmember annite that is a class of things frequently found in the place the world (the geographical area corresponding to the entire surface area of planet earth).
