quartzite

As nouns the difference between muscovite and quartzite

is that muscovite is (mineralogy) a pale brown mineral of the mica group, being a basic potassium aluminosilicate with the chemical formula k]]al₂(si₃al)o₁₀(oh,[[fluorine|f)₂; used as an electrical insulator etc while quartzite is a metamorphic rock consisting of interlocking grains of quartz.

As a noun quartzite

is a metamorphic rock consisting of interlocking grains of quartz.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between quartzite and plagioclase

is that quartzite is a metamorphic rock consisting of interlocking grains of quartz while plagioclase is (mineralogy) any of a group of aluminum silicate feldspathic minerals ranging in their ratio of calcium to sodium.

As nouns the difference between schist and quartzite

is that schist is any crystalline rock having a foliated structure and hence admitting of ready division into slabs or slates while quartzite is a metamorphic rock consisting of interlocking grains of quartz.

As nouns the difference between flagstone and quartzite

is that flagstone is a flat, rectangular piece of rock or stone used for paving or roofing while quartzite is a metamorphic rock consisting of interlocking grains of quartz.

As nouns the difference between quartzite and silica

is that quartzite is a metamorphic rock consisting of interlocking grains of quartz while silica is silicon dioxide.

As a noun quartzite is

a metamorphic rock consisting of interlocking grains of quartz.

As nouns the difference between quartzite and quartzine

is that quartzite is a metamorphic rock consisting of interlocking grains of quartz while quartzine is (mineralogy) a fibrous form of silica similar to chalcedony.