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Gneiss
[[Gneiss|250px]]
Pronounce {{{pronounce}}}
Rare Metal {{{rare}}}
Type Metamorphic
Cleave
Hard
Streak
Lust
Specific Gravity {{{specify}}}
Chemical Compounds
Essential mineral(s) {{{essential}}}
Accessory mineral(s) {{{accessory}}}

Gneiss is a high grade foliated metamorphic rock. Gneiss is formed with high temperature (650-800 C) and high pressure (3-7Kbar). Gneiss may have a protolith of any kind of rock, be it igneous, sedimentary, or another metamorphic rock. Gneiss is often confused with or associated with granite. This is because Migmatite gneisses contain melted rock and can act as feeder zones for granite minerals.

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