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Gneiss vs Trachyte


Trachyte 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   
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar   

History
  
  

Discoverer
Unknown   
Alexandre Brongniart and René Just Haüy   

Etymology
From the Middle High German verb gneist (to spark; so called because the rock glitters)   
From Greek trakhus rough’ or trakhutēs roughness   

Class
Metamorphic Rocks   
Igneous Rocks   

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

Family
  
  

Group
Not Applicable   
Volcanic   

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

Texture

Texture
Banded, Foliated, Platy   
Aphanitic to Porphyritic   

Color
Black, Brown, Pink, Red, White   
Black, Brown, Dark Greenish - Grey, Green, Grey, Light to Dark Grey, White   

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   
No   

Appearance
Foliated   
Banded   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone   
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts   
Artifacts, Monuments, Sculpture, Small Figurines   

Other Uses
  
  

Commercial Uses
Cemetery Markers, Jewelry, Tombstones, Used in aquariums   
Cemetery Markers, Creating Artwork   

Types

Types
Augen Gneiss, Henderson Gneiss, Lewisian Gneiss, Archean and Proterozoic Gneiss.   
Not Available   

Features
Generally rough to touch, Is one of the oldest rock   
Available in Lots of Colors and Patterns, Is one of the oldest rock, Matrix variable   

Archaeological Significance
  
  

Monuments
Used   
Used   

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

Sculpture
Not Yet Used   
Used   

Famous Sculptures
Not Applicable   
Data Not Available   

Pictographs
Not Used   
Used   

Petroglyphs
Not Used   
Used   

Figurines
Not Yet Used   
Used   

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.   
Trachyte is an igneous volcanic rock with an aphanitic to porphyritic texture. It is the volcanic equivalent of syenite rock and forms as a result of magmatic differentiation.   

Composition
  
  

Mineral Content
Biotite, Chlorite, Feldspar, Garnet, Graphite, Hornblade, Micas, Muscovite or Illite, Quartz, Quartzite, Silica, Zircon   
Augite, Biotite, Feldspar, Hornblade, Plagioclase, Quartz   

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

Transformation
  
  

Metamorphism
Yes   
Yes   

Types of Metamorphism
Impact Metamorphism   
Cataclastic Metamorphism, Contact 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, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion   

Properties

Physical Properties
  
  

Hardness
7   
6   

Grain Size
Medium to Coarse Grained   
Fine Grained   

Fracture
Irregular   
Not Available   

Streak
White   
White   

Porosity
Very Less Porous   
Less Porous   

Luster
Dull   
Metallic   

Compressive Strength
125.00 N/mm2   
17
150.00 N/mm2   
14

Cleavage
Poor   
Not Available   

Toughness
1.2   
Not Available   

Specific Gravity
2.5-2.7   
2.7   

Transparency
Translucent to Opaque   
Opaque   

Density
2.6-2.9 g/cm3   
2.43-2.45 g/cm3   

Thermal Properties
  
  

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

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Iran, Iraq, Kazakhstan, Kyrgyzstan, Mongolia, Russia   
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam   

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

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

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

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

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

Deposits in Oceania Continent
  
  

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

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Gneiss vs Trachyte 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 Trachyte 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. Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar. 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 Trachyte information and Gneiss vs Trachyte characteristics in the upcoming sections.

Compare Metamorphic Rocks

Gneiss vs Trachyte 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 Trachyte characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Gneiss and Properties of Trachyte. Learn more about Gneiss vs Trachyte in the next section. The interior uses of Gneiss include Countertops, Decorative aggregates, Flooring and Interior decoration whereas the interior uses of Trachyte include Decorative aggregates, Flooring, Homes and Interior decoration. Due to some exceptional properties of Gneiss and Trachyte, they have various applications in construction industry. The uses of Gneiss in construction industry include As dimension stone and that of Trachyte include As dimension stone, Building houses or walls, Cement manufacture, Construction aggregate, For road aggregate, Landscaping, Making natural cement, Manufacture of magnesium and dolomite refractories.

More about Gneiss and Trachyte

Here you can know more about Gneiss and Trachyte. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Gneiss and Trachyte 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 Trachyte includes Augite, Biotite, Feldspar, Hornblade, Plagioclase, Quartz. You can also check out the list of all Metamorphic Rocks. When we have to compare Gneiss vs Trachyte, 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, Trachyte is available in black, brown, dark greenish - grey, green, grey, light to dark grey, white colors. Appearance of Gneiss is Foliated and that of Trachyte is Banded. Properties of rock is another aspect for Gneiss vs Trachyte. The hardness of Gneiss is 7 and that of Trachyte is 6. The types of Gneiss are Augen Gneiss, Henderson Gneiss, Lewisian Gneiss, Archean and Proterozoic Gneiss. whereas types of Trachyte are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Gneiss and Trachyte is white. The specific heat capacity of Gneiss is Not Available and that of Trachyte is Not Available. 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 Trachyte is heat resistant, impact resistant, wear resistant.

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