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biotite has a colorless streak
no,biotite is not attracted to magetic forces (its not attracted to magnet)
Biotite mica has a Mohs hardness of 2.5-3.0.
Biotite is a form of mica, and can be seen without difficulty in the right kind of rocks.
A biotite is a variety of dark brown mica, a mixed aluinosilicate and fluoride of potassium, magnesium and iron.