Mica ke lebitso le akaretsang la diminerale tsa sehlopha sa mica. Ke aluminosilicate ya potassium, aluminium, magnesium, tšepe, lithium le dimethale tse ding, tseo kaofela di nang le mealo le monoclinic. Kristale ke pseudohexagonal lamellae kapa plate jwalo ka, ka nako e nngwe columnar. Lekhalo la lamellar le feletse haholo, ka kganya ya khalase le lakane e tenyetsehang. Index ya refractive ya mica e eketseha ka keketseho ya dikahare tsa tshepe, ho tloha ho protrusion e tlase ho ya ho protrusion e mahareng. Mofuta o se nang tshepe ha o na mmala ka hara flake. Ha dikahare tsa tshepe di le hodimo, mmala o lefifi le ho feta, mme o na le polychromatic le monyelo o eketsehileng.

Boholo ba lekhapetla la Mica: 6-10mesh, 10-20mesh,
Phofo ea Mica: 200mesh, 325mesh, 600mesh, 800mesh, 1250mesh, 2000mesh, 3000mesh le 5000mesh.

Kopo
Indastering, biotite e sebelisa haholo-holo ho thibela mocheso le ho hanyetsa mocheso, hammoho le ho hanyetsa asiti, ho hanyetsa alkali, ho hanyetsa khatello le ho hanyetsa ho petsoha, e le thepa ea ho thibela mocheso ea lisebelisoa tsa motlakase le lisebelisoa tsa motlakase; ea bobeli, e sebelisoa ho etsa lifensetere le likarolo tsa mechini tsa liboiler tsa mouoane le lionto tsa ho qhibilihisa. Li-chips tsa Mica le phofo ea mica li ka sebetsoa hore e be pampiri ea mica, 'me li ka boela tsa nkela sebaka sa pampiri ea mica ho hlahisa lisebelisoa tse fapaneng tsa ho thibela mocheso tse theko e tlase le tse lekanang.