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Coal vs Gneiss


Gneiss vs Coal


Definition

Definition
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds   
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   

History
  
  

Origin
USA   
Unknown   

Discoverer
John Peter Salley   
Unknown   

Etymology
From the Old English term col, which has meant mineral of fossilized carbon since the 13th century   
From the Middle High German verb gneist (to spark; so called because the rock glitters)   

Class
Sedimentary Rocks   
Metamorphic Rocks   

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

Family
  
  

Group
Not Applicable   
Not Applicable   

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

Texture

Texture
Amorphous, Glassy   
Banded, Foliated, Platy   

Color
Black, Brown, Dark Brown, Grey, Light to Dark Grey   
Black, Brown, Pink, Red, White   

Maintenance
Less   
More   

Durability
Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
No   
Yes   

Stain Resistant
No   
Yes   

Wind Resistant
No   
Yes   

Acid Resistant
No   
No   

Appearance
Veined or Pebbled   
Foliated   

Uses

Architecture
  
  

Interior Uses
Not Yet Used   
Countertops, Decorative Aggregates, Flooring, Interior Decoration   

Exterior Uses
Not Yet Used   
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone   

Other Architectural Uses
Not Yet Used   
Curbing   

Industry
  
  

Construction Industry
Cement Manufacture, for Road Aggregate, Making natural cement, Steel Production   
As Dimension Stone   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts   
Artifacts   

Other Uses
  
  

Commercial Uses
Alumina Refineries, Electricity Generation, Liquid Fuel, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Paper Industry   
Cemetery Markers, Jewelry, Tombstones, Used in aquariums   

Types

Types
Peat, Lignite, Sub-Bituminous Coal, Bituminous Coal, Anthracite, Graphite   
Augen Gneiss, Henderson Gneiss, Lewisian Gneiss, Archean and Proterozoic Gneiss.   

Features
Helps in production of Heat and Electricity, Used as fossil fuel   
Generally rough to touch, Is one of the oldest rock   

Archaeological Significance
  
  

Monuments
Not Yet Used   
Used   

Famous Monuments
Not Applicable   
Konark Sun Temple in India, Washington Monument, US   

Sculpture
Not Yet Used   
Not Yet Used   

Famous Sculptures
Not Applicable   
Not Applicable   

Pictographs
Not Used   
Not Used   

Petroglyphs
Not Used   
Not Used   

Figurines
Not Yet Used   
Not Yet Used   

Fossils
Present   
Absent   

Formation

Formation
Coal forms from the accumulation of plant debris in a swamp environment which is buried by sediments such as mud or sand and then compacted to form coal.   
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.   

Composition
  
  

Mineral Content
Analcime, Apatite, Barite, Calcite, Chalcopyrite, Chlorite, Chromite, Clausthalite, Clay Minerals, Crandallite Group, Dolomite, Feldspar, Galena, Gypsum, Marcasite, Muscovite or Illite, Pyrite, Quartz, Siderite, Sphalerite, Zircon   
Biotite, Chlorite, Feldspar, Garnet, Graphite, Hornblade, Micas, Muscovite or Illite, Quartz, Quartzite, Silica, Zircon   

Compound Content
Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur   
Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, MnO, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide   

Transformation
  
  

Metamorphism
Yes   
Yes   

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

Weathering
No   
Yes   

Types of Weathering
Not Applicable   
Biological Weathering, Mechanical Weathering   

Erosion
No   
Yes   

Types of Erosion
Not Applicable   
Chemical Erosion, Coastal Erosion, Sea Erosion   

Properties

Physical Properties
  
  

Hardness
1-1.5   
7   

Grain Size
Medium to Fine Coarse Grained   
Medium to Coarse Grained   

Fracture
Conchoidal   
Irregular   

Streak
Black   
White   

Porosity
Less Porous   
Very Less Porous   

Luster
Dull to Vitreous to Submetallic   
Dull   

Compressive Strength
Not Available   
125.00 N/mm2   
17

Cleavage
Non-Existent   
Poor   

Toughness
Not Available   
1.2   

Specific Gravity
1.1-1.4   
2.5-2.7   

Transparency
Opaque   
Translucent to Opaque   

Density
1100-1400 g/cm3   
2.6-2.9 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
1.32 kJ/Kg K   
4
Not Available   

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

Reserves

Deposits in Eastern Continents
  
  

Asia
Bangladesh, Burma, Cambodia, China, India, Indonesia, Kazakhstan, Malaysia, Mongolia, Pakistan, Turkey, Vietnam   
China, India, Iran, Iraq, Kazakhstan, Kyrgyzstan, Mongolia, Russia   

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

Europe
Belgium, Bulgaria, England, France, Germany, Greece, Hungary, Kosovo, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, The Czech Republic, Ukraine, United Kingdom   
Albania, Austria, Bosnia and Herzegovina, Finland, France, Georgia, Germany, Hungary, Italy, Kosovo, Monaco, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, Switzerland, Ukraine, United Kingdom   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

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

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

Deposits in Oceania Continent
  
  

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

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Coal vs Gneiss 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 Coal and Gneiss Reserves. Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds. 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. 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 Coal vs Gneiss information and Coal vs Gneiss characteristics in the upcoming sections.

Compare Sedimentary Rocks

Coal vs Gneiss 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. Coal vs Gneiss characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Coal and Properties of Gneiss. Learn more about Coal vs Gneiss in the next section. The interior uses of Coal include Not yet used whereas the interior uses of Gneiss include Countertops, Decorative aggregates, Flooring and Interior decoration. Due to some exceptional properties of Coal and Gneiss, they have various applications in construction industry. The uses of Coal in construction industry include Cement manufacture, For road aggregate, Making natural cement, Steel production and that of Gneiss include As dimension stone.

More about Coal and Gneiss

Here you can know more about Coal and Gneiss. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Coal and Gneiss consists of mineral content and compound content. The mineral content of Coal includes Analcime, Apatite, Barite, Calcite, Chalcopyrite, Chlorite, Chromite, Clausthalite, Clay Minerals, Crandallite Group, Dolomite, Feldspar, Galena, Gypsum, Marcasite, Muscovite or Illite, Pyrite, Quartz, Siderite, Sphalerite, Zircon and mineral content of Gneiss includes Biotite, Chlorite, Feldspar, Garnet, Graphite, Hornblade, Micas, Muscovite or Illite, Quartz, Quartzite, Silica, Zircon. You can also check out the list of all Sedimentary Rocks. When we have to compare Coal vs Gneiss, the texture, color and appearance plays an important role in determining the type of rock. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas, Gneiss is available in black, brown, pink, red, white colors. Appearance of Coal is Veined or Pebbled and that of Gneiss is Foliated. Properties of rock is another aspect for Coal vs Gneiss. The hardness of Coal is 1-1.5 and that of Gneiss is 7. The types of Coal are Peat, Lignite, Sub-Bituminous Coal, Bituminous Coal, Anthracite, Graphite whereas types of Gneiss are Augen Gneiss, Henderson Gneiss, Lewisian Gneiss, Archean and Proterozoic Gneiss.. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Coal is black while that of Gneiss is white. The specific heat capacity of Coal is 1.32 kJ/Kg K and that of Gneiss is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Coal is heat resistant whereas Gneiss is heat resistant, pressure resistant, scratch resistant, wear resistant.

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