Composition: Potassium, silicon, hydrogen, oxygen and fluorine.

Color: White, grey, silver white, brownish white, or greenish white.

Streak: White.

Hardness: 2-2.5 Gypsum-Finger.
   . 
Lustre: Vitreous (Glassy)

Cleavage: [001] Perfect.

Diaphaniety: Transparent to translucent.

Some other examples of Mica are: Binnite, fuchsite, isinglass, potash mica,

Density: 2.77-2.88, Average = 2.82

Fracture: Brittle - Sectile - Brittle facture with slightly sectile shavings possible.

Where it's found: Brazil