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Gneiss vs Quartzite


Quartzite vs Gneiss


Definition

Definition
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  
Quartzite is a non-foliated metamorphic rock that forms by the metamorphism of pure quartz Sandstone  

History
  
  

Origin
-  
-  

Discoverer
Unknown  
Unknown  

Etymology
From the Middle High German verb gneist (to spark; so called because the rock glitters)  
From quartz + -ite  

Class
Metamorphic Rocks  
Metamorphic Rocks  

Sub-Class
Durable Rock, Hard Rock  
Durable Rock, Hard Rock  

Family
  
  

Group
-  
-  

Other Categories
Coarse Grained Rock, Medium Grained Rock, Opaque Rock  
Medium Grained Rock, Opaque Rock  

Texture

Texture
Banded, Foliated, Platy  
Foliated, Granular  

Color
Black, Brown, Pink, Red, White  
Black, Blue, Brown, Green, Light Grey, Purple, White, Yellow  

Maintenance
More  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
Yes  
Yes  

Stain Resistant
Yes  
Yes  

Wind Resistant
Yes  
Yes  

Acid Resistant
No  
Yes  

Appearance
Foliated  
Lustrous  

Uses

Architecture
  
  

Interior Uses
Countertops, Decorative Aggregates, Flooring, Interior Decoration  
Countertops, Decorative Aggregates, Flooring, Homes  

Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone  
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone  

Other Architectural Uses
Curbing  
Curbing  

Industry
  
  

Construction Industry
As Dimension Stone  
Arrowheads, As Dimension Stone, Cement Manufacture, Construction Aggregate, Cutting Tool, for Road Aggregate, Making natural cement, Production of Glass and Ceramics, Rail Track Ballast, Roadstone  

Medical Industry
-  
-  

Antiquity Uses
Artifacts  
Artifacts, Jewellery, Monuments, Sculpture  

Other Uses
  
  

Commercial Uses
Cemetery Markers, Jewelry, Tombstones, Used in aquariums  
An Oil and Gas Reservoir, As armour rock for sea walls, Cemetery Markers, Commemorative Tablets, In aquifers, Laboratory bench tops, Petroleum reservoirs, Soil Conditioner, Source of Magnesia (MgO), Tombstones, Used in aquariums  

Types

Types
Augen Gneiss, Henderson Gneiss, Lewisian Gneiss, Archean and Proterozoic Gneiss.  
Orthoquartzite and Metaquartzite  

Features
Generally rough to touch, Is one of the oldest rock  
Generally rough to touch, Is one of the oldest rock  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
Konark Sun Temple in India, Washington Monument, US  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
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.   
Quartzite forms from sandstone and the mineral quartz being put under extreme heat and pressure.   

Composition
  
  

Mineral Content
Biotite, Chlorite, Feldspar, Garnet, Graphite, Hornblade, Micas, Muscovite or Illite, Quartz, Quartzite, Silica, Zircon  
Chlorite, Epidote, Hematite, Kyanite, Magnetite, Muscovite or Illite, Quartz  

Compound Content
Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, MnO, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide  
Aluminium Oxide, CaO, Iron(III) Oxide, MgO, Sodium Oxide, Silicon Dioxide  

Transformation
  
  

Metamorphism
Yes  
Yes  

Types of Metamorphism
Impact Metamorphism  
Burial Metamorphism, Cataclastic Metamorphism, Hydrothermal Metamorphism, Regional Metamorphism  

Weathering
Yes  
Yes  

Types of Weathering
Biological Weathering, Mechanical Weathering  
Biological Weathering, Chemical Weathering, Mechanical Weathering  

Erosion
Yes  
Yes  

Types of Erosion
Chemical Erosion, Coastal Erosion, Sea Erosion  
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion  

Properties

Physical Properties
  
  

Hardness
7  
6-7  

Grain Size
Medium to Coarse Grained  
Medium Grained  

Fracture
Irregular  
Uneven, Splintery or Conchoidal  

Streak
White  
White  

Porosity
Very Less Porous  
Less Porous  

Luster
Dull  
Vitreous  

Compressive Strength
125.00 N/mm2  
25
115.00 N/mm2  
27

Cleavage
-  
Indiscernible  

Toughness
1.2  
1.9  

Specific Gravity
2.5-2.7  
2.6-2.8  

Transparency
Translucent to Opaque  
Transparent to Translucent  

Density
2.6-2.9 g/cm3  
2.32-2.42 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.70 kJ/Kg K  
24
0.75 kJ/Kg K  
20

Resistance
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant  
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant  

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Iran, Iraq, Kazakhstan, Kyrgyzstan, Mongolia, Russia  
China, India, Israel, Russia, South Korea, Thailand, Turkey  

Africa
Cameroon, Ethiopia, Ghana, Kenya, Madagascar, Morocco, Mozambique, Namibia, Nigeria, Tanzania, Togo  
Ethiopia, Morocco, South Africa, Zimbabwe  

Europe
Albania, Austria, Bosnia and Herzegovina, Finland, France, Georgia, Germany, Hungary, Italy, Kosovo, Monaco, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, Switzerland, Ukraine, United Kingdom  
England, Italy, Norway, Scotland, Sweden, United Kingdom  

Others
-  
Greenland  

Deposits in Western Continents
  
  

North America
Canada, Costa Rica, Cuba, Mexico, Panama, USA  
Bahamas, Canada, USA  

South America
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Peru, Venezuela  
Brazil, Colombia, Venezuela  

Deposits in Oceania Continent
  
  

Australia
New South Wales, New Zealand, Queensland, Victoria  
New Zealand, Queensland, Western Australia  

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Gneiss vs Quartzite Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Gneiss and Quartzite Reserves. 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. Quartzite is a non-foliated metamorphic rock that forms by the metamorphism of pure quartz Sandstone. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Gneiss vs Quartzite information and Gneiss vs Quartzite characteristics in the upcoming sections.

Compare Metamorphic Rocks

Gneiss vs Quartzite Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Gneiss vs Quartzite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Gneiss and Properties of Quartzite. Learn more about Gneiss vs Quartzite in the next section. The interior uses of Gneiss include Countertops, Decorative aggregates, Flooring and Interior decoration whereas the interior uses of Quartzite include Countertops, Decorative aggregates, Flooring and Homes. Due to some exceptional properties of Gneiss and Quartzite, they have various applications in construction industry. The uses of Gneiss in construction industry include As dimension stone and that of Quartzite include Arrowheads, As dimension stone, Cement manufacture, Construction aggregate, Cutting tool, For road aggregate, Making natural cement, Production of glass and ceramics, Rail track ballast, Roadstone.

More about Gneiss and Quartzite

Here you can know more about Gneiss and Quartzite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Gneiss and Quartzite consists of mineral content and compound content. The mineral content of Gneiss includes Biotite, Chlorite, Feldspar, Garnet, Graphite, Hornblade, Micas, Muscovite or Illite, Quartz, Quartzite, Silica, Zircon and mineral content of Quartzite includes Chlorite, Epidote, Hematite, Kyanite, Magnetite, Muscovite or Illite, Quartz. You can also check out the list of all Metamorphic Rocks. When we have to compare Gneiss vs Quartzite, the texture, color and appearance plays an important role in determining the type of rock. Gneiss is available in black, brown, pink, red, white colors whereas, Quartzite is available in black, blue, brown, green, light grey, purple, white, yellow colors. Appearance of Gneiss is Foliated and that of Quartzite is Lustrous. Properties of rock is another aspect for Gneiss vs Quartzite. The hardness of Gneiss is 7 and that of Quartzite is 6-7. The types of Gneiss are Augen Gneiss, Henderson Gneiss, Lewisian Gneiss, Archean and Proterozoic Gneiss. whereas types of Quartzite are Orthoquartzite and Metaquartzite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Gneiss and Quartzite is white. The specific heat capacity of Gneiss is 0.70 kJ/Kg K and that of Quartzite is 0.75 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Gneiss is heat resistant, pressure resistant, scratch resistant, wear resistant whereas Quartzite is heat resistant, impact resistant, pressure resistant, wear resistant.

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