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Pyrolite and Comendite


Comendite and Pyrolite


Definition

Definition
Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt   
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite   

History
  
  

Origin
Pike County, U.S   
Italy   

Discoverer
Unknown   
Unknown   

Etymology
From the chemical and mineralogical composition of the upper mantle of the Earth   
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Plutonic   
Volcanic   

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

Texture

Texture
Phaneritic   
Porphyritic   

Color
Dark Greenish - Grey   
Blue, Bluish - Grey   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
No   
Yes   

Wind Resistant
No   
Yes   

Acid Resistant
Yes   
Yes   

Appearance
Rough and Shiny   
Foliated   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Interior Decoration   
Countertops, Decorative Aggregates, Interior Decoration   

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone, Cobblestones   
Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Raw material for the manufacture of mortar   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments, Sculpture   
Artifacts   

Other Uses
  
  

Commercial Uses
Creating Artwork, Gemstone, Jewelry, Source of Chromite, Platinum, Nickel and Garnet, Source of Diamonds   
Cemetery Markers   

Types

Types
Dunite, Wehrlite, Harzburgite, Lherzolite   
Rhyolite   

Features
Constitutes upper part of the Earth's mantle, Generally rough to touch, Is one of the oldest rock   
Very fine grained rock, It is One of the Oldest, Strongest and Hardest Rock   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Data Not Available   
Not Applicable   

Sculpture
Used   
Not Yet Used   

Famous Sculptures
Data Not Available   
Not Applicable   

Pictographs
Used   
Not Used   

Petroglyphs
Used   
Not Used   

Figurines
Used   
Not Yet Used   

Fossils
Absent   
Absent   

Formation

Formation
Pyrolite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.   
Comendite is a type of Igneous rock which is formed due to cooling and solidification of lava or magma. It may form with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.   

Composition
  
  

Mineral Content
Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene   
Albite, Amphibole, Quartz   

Compound Content
Ca, Fe, Mg, Potassium, Silicon Dioxide, Sodium, Titanium Dioxide   
Al, Fe, Potassium Oxide   

Transformation
  
  

Metamorphism
Yes   
Yes   

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

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
5.5-6   
6-7   

Grain Size
Coarse Grained   
Medium Grained   

Fracture
Irregular   
Pervasive   

Streak
White   
Bluish Black   

Porosity
Less Porous   
Highly Porous   

Luster
Shiny   
Dull   

Compressive Strength
107.55 N/mm2   
19
92.40 N/mm2   
21

Cleavage
Imperfect   
Not Available   

Toughness
2.1   
2   

Specific Gravity
3-3.01   
2.38   

Transparency
Translucent to Opaque   
Opaque   

Density
3.1-3.4 g/cm3   
Not Available   

Thermal Properties
  
  

Specific Heat Capacity
1.25 kJ/Kg K   
6
Not Available   

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

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Indonesia, Kazakhstan, Russia, South Korea, Thailand, Turkey   
China   

Africa
Morocco, South Africa   
East Africa   

Europe
Finland, France, Georgia, Germany, Great Britain, Italy, Kazakhstan, Netherlands, Norway, Spain, Switzerland, Venezuela   
Italy   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
Not Yet Found   

South America
Brazil   
Not Yet Found   

Deposits in Oceania Continent
  
  

Australia
New Zealand, Western Australia   
Queensland   

Summary >>
<< Reserves

All about Pyrolite and Comendite Properties

Know all about Pyrolite and Comendite properties here. All properties of rocks are important as they define the type of rock and its application. Pyrolite and Comendite belong to Igneous Rocks.Texture of Pyrolite is Phaneritic whereas that of Comendite is Porphyritic. Pyrolite appears Rough and Shiny and Comendite appears Foliated. The luster of Pyrolite is shiny while that of Comendite is dull. Pyrolite is available in dark greenish - grey colors whereas Comendite is available in blue, bluish - grey colors. The commercial uses of Pyrolite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds and that of Comendite are cemetery markers.

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