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Schist and Granulite


Granulite and Schist


Definition

Definition
Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation  
Granulite is fine to medium grained metamorphic rock with a granular of polygonal crystals.  

History
  
  

Origin
-  
Central Europe  

Discoverer
Unknown  
Unknown  

Etymology
From French schiste, Greek skhistos i.e. split  
From Latin granulum, a little grain or fine grained  

Class
Metamorphic Rocks  
Metamorphic Rocks  

Sub-Class
Durable Rock, Medium Hardness Rock  
Durable Rock, Hard Rock  

Family
  
  

Group
-  
-  

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

Texture

Texture
Foliated, Platy  
Granoblastic  

Color
Black, Blue, Brown, Dark Brown, Green, Grey, Silver  
Black, Brown  

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
No  
Yes  

Stain Resistant
No  
Yes  

Wind Resistant
No  
No  

Acid Resistant
No  
No  

Appearance
Layered and Shiny  
Veined or Pebbled  

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Floor Tiles, Interior Decoration  
Bathrooms, Countertops, Decorative Aggregates, Entryways, Flooring, Homes, Hotels, Interior Decoration, Kitchens, Stair Treads  

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

Other Architectural Uses
-  
Curbing  

Industry
  
  

Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, for Road Aggregate, Roadstone  
As Dimension Stone, Building houses or walls  

Medical Industry
-  
-  

Antiquity Uses
Artifacts  
Artifacts, Monuments, Sculpture  

Other Uses
  
  

Commercial Uses
Used in aquariums, Writing Slates  
Curling, Gemstone, Laboratory bench tops, Soil Conditioner, Tombstones  

Types

Types
Mica Schists, Calc-Silicate Schists, Graphite Schists, Blueschists, Whiteschists, Greenschists, Hornblende Schist, Talc Schist, Chlorite Schist, Garnet Schist, Glaucophane schist.  
Metamorphic rock  

Features
Easily splits into thin plates, Smooth to touch  
Clasts are smooth to touch  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Schist formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.  
Granulite is a fine-grained granular metamorphic rock in which the main component minerals are feldspars and quartz and forms at high temperature and pressure conditions.  

Composition
  
  

Mineral Content
Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc  
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Quartz  

Compound Content
CaO, Carbon Dioxide, MgO  
Aluminium Oxide, CaO, Carbon Dioxide, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Sulfur Dioxide, Titanium Dioxide  

Transformation
  
  

Metamorphism
No  
No  

Types of Metamorphism
-  
-  

Weathering
Yes  
Yes  

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

Erosion
Yes  
Yes  

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

Properties

Physical Properties
  
  

Hardness
3.5-4  
6-7  

Grain Size
Medium to Fine Coarse Grained  
Medium to Coarse Grained  

Fracture
Conchoidal  
-  

Streak
White  
White  

Porosity
Highly Porous  
Very Less Porous  

Luster
Shiny  
Vitreous  

Compressive Strength
150.00 N/mm2  
22
175.00 N/mm2  
20

Cleavage
Slaty  
-  

Toughness
1.5  
-  

Specific Gravity
2.5-2.9  
2.8-3.0  

Transparency
Opaque  
Opaque  

Density
2.8-2.9 g/cm3  
3.06-3.33 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.70 kJ/Kg K  
24
0.14 kJ/Kg K  
33

Resistance
Impact Resistant, Pressure Resistant, Water Resistant  
Heat Resistant, Wear Resistant  

Reserves

Deposits in Eastern Continents
  
  

Asia
Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam  
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam  

Africa
Egypt, Ethiopia, Morocco, Nigeria, South Africa  
Angola, Egypt, Madagascar, Nigeria, South Africa  

Europe
Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland  
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic  

Others
-  
-  

Deposits in Western Continents
  
  

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

South America
Brazil, Colombia, Guyana  
-  

Deposits in Oceania Continent
  
  

Australia
New South Wales, New Zealand, Queensland  
-  

Summary >>
<< Reserves

All about Schist and Granulite Properties

Know all about Schist and Granulite properties here. All properties of rocks are important as they define the type of rock and its application. Schist and Granulite belong to Metamorphic Rocks.Texture of Schist is Foliated, Platy whereas that of Granulite is Granoblastic. Schist appears Layered and Shiny and Granulite appears Veined or Pebbled. The luster of Schist is shiny while that of Granulite is vitreous. Schist and Granulite are available in black, blue, brown, dark brown, green, grey, silver colors. The commercial uses of Schist are used in aquariums, writing slates and that of Granulite are curling, gemstone, laboratory bench tops, soil conditioner, tombstones.

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