Gneiss is foliated metamorphic rock that has a banded appearance and is made up of granular mineral grains. It typically contains abundant quartz or feldspar minerals.
- Intermediate to light color; medium – coarse crystals.
- Coarsely banded, fine dark bands/coarse light bands.
Composition: Quartz, feldspar, mica.
Formed from metamorphosed granites or sandy marine sediments.
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