Schist is a protolith of gneiss.

Rock group	Metamorphic
Metamorphism type	Regional
Metamorphic rock class	Metapelitic Marl
Protolith	Phyllite

Schist in Hand Sample

Chlorite schist
Magnetite muscovite schist
Garnetiferous schist
Muscovite staurolite schist
Archean-aged schist from the Great Unconformity exposed at Wind River Canyon, WY

Schist in Thin Section

Thin Section GigaPans

Garnet mica schist, plane polars
Garnet mica schist, crossed polars
Chlorite schist, plane polars
Chlorite schist, crossed polars
Actinolite schist, plane polars
Actinolite schist, crossed polars
Talc tremolite schist, plane polars
Talc tremolite schist, crossed polars
Graphite schist, plane polars
Graphite schist, crossed polars