Muscovite is often called common or potash mica; Lepidolite is characterised by containing lithia in addition; Biotite contains a large amount of magnesia and oxide of iron; whilst phlogopite contains still more of the former substance.
"The Student's Elements of Geology"
Sir Charles Lyell
The mica in recent volcanic rocks, gabbros, and diorites is usually Biotite, while that so common in metamorphic limestones is usually, if not always, phlogopite.
"The Student's Elements of Geology"
Sir Charles Lyell
The phlogopite mica of Canada occurs in pyroxenite dikes.
"The Economic Aspect of Geology"
C. K. Leith