Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks 0
From the Middle High German verb gneist (to spark; so called because the rock glitters) 0
Durable Rock, Hard Rock 0
Coarse Grained Rock, Medium Grained Rock, Opaque Rock 0
Banded, Foliated, Platy 0
Black, Brown, Pink, Red, White 0
Countertops, Decorative Aggregates, Flooring, Interior Decoration 0
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone 0
Cemetery Markers, Jewelry, Tombstones, Used in aquariums 0
Augen Gneiss, Henderson Gneiss, Lewisian Gneiss, Archean and Proterozoic Gneiss. 0
Generally rough to touch, Is one of the oldest rock 0
Archaeological Significance
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Konark Sun Temple in India, Washington Monument, US 0
Gneiss is a high grade metamorphic rock i.e. it has been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of Gneiss forms from volcanic rock, shale or granitie. 0
Biotite, Chlorite, Feldspar, Garnet, Graphite, Hornblade, Micas, Muscovite or Illite, Quartz, Quartzite, Silica, Zircon 0
Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, MnO, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide 0
Biological Weathering, Mechanical Weathering 0
Chemical Erosion, Coastal Erosion, Sea Erosion 0
Medium to Coarse Grained 0
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant 0
Deposits in Eastern Continents
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China, India, Iran, Iraq, Kazakhstan, Kyrgyzstan, Mongolia, Russia 0
Cameroon, Ethiopia, Ghana, Kenya, Madagascar, Morocco, Mozambique, Namibia, Nigeria, Tanzania, Togo 0
Albania, Austria, Bosnia and Herzegovina, Finland, France, Georgia, Germany, Hungary, Italy, Kosovo, Monaco, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, Switzerland, Ukraine, United Kingdom 0
Deposits in Western Continents
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Canada, Costa Rica, Cuba, Mexico, Panama, USA 0
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Peru, Venezuela 0
Deposits in Oceania Continent
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New South Wales, New Zealand, Queensland, Victoria 0