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Tephrite and Pyrolite


Pyrolite and Tephrite


Definition

Definition
Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock   
Pyrolite is an igneous rock consisting of about three parts of peridotite and one part of basalt   

History
  
  

Origin
Germany   
Pike County, U.S   

Discoverer
Van Tooren   
Unknown   

Etymology
From Greek tephra, ashes from Indo-European base, to burn   
From the chemical and mineralogical composition of the upper mantle of the Earth   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Volcanic   
Plutonic   

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

Texture

Texture
Aphanitic to Porphyritic   
Phaneritic   

Color
Black, Brown, Colourless, Green, Grey, White   
Dark Greenish - Grey   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
No   
No   

Wind Resistant
Yes   
No   

Acid Resistant
No   
Yes   

Appearance
Vesicular   
Rough and Shiny   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
Landscaping   
As Dimension Stone, Cobblestones   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Sculpture   
Artifacts, Monuments, Sculpture   

Other Uses
  
  

Commercial Uses
Production of Lime, Soil Conditioner   
Creating Artwork, Gemstone, Jewelry, Source of Chromite, Platinum, Nickel and Garnet, Source of Diamonds   

Types

Types
Not Available   
Dunite, Wehrlite, Harzburgite, Lherzolite   

Features
Host Rock for Lead   
Constitutes upper part of the Earth's mantle, Generally rough to touch, Is one of the oldest rock   

Archaeological Significance
  
  

Monuments
Not Yet Used   
Used   

Famous Monuments
Not Applicable   
Data Not Available   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Not Used   
Used   

Petroglyphs
Not Used   
Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Tephrite 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.   
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.   

Composition
  
  

Mineral Content
Alkali feldspar, Nepheline, Plagioclase, Pyroxene   
Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene   

Compound Content
CaO, Carbon Dioxide, MgO, Silicon Dioxide   
Ca, Fe, Mg, Potassium, Silicon Dioxide, Sodium, Titanium Dioxide   

Transformation
  
  

Metamorphism
Yes   
Yes   

Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism   
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact 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   
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion   

Properties

Physical Properties
  
  

Hardness
6.5   
5.5-6   

Grain Size
Medium to Fine Coarse Grained   
Coarse Grained   

Fracture
Uneven   
Irregular   

Streak
Bluish Black   
White   

Porosity
Very Less Porous   
Less Porous   

Luster
Subvitreous to Dull   
Shiny   

Compressive Strength
90.00 N/mm2   
22
107.55 N/mm2   
19

Cleavage
Crenulation and Pervasive   
Imperfect   

Toughness
2.4   
2.1   

Specific Gravity
2.86   
3-3.01   

Transparency
Opaque   
Translucent to Opaque   

Density
2.8-2.9 g/cm3   
3.1-3.4 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.92 kJ/Kg K   
10
1.25 kJ/Kg K   
6

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

Reserves

Deposits in Eastern Continents
  
  

Asia
Not Yet Found   
China, India, Indonesia, Kazakhstan, Russia, South Korea, Thailand, Turkey   

Africa
Namibia, Uganda   
Morocco, South Africa   

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

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
USA   
Canada, USA   

South America
Not Yet Found   
Brazil   

Deposits in Oceania Continent
  
  

Australia
New Zealand, Western Australia   
New Zealand, Western Australia   

Summary >>
<< Reserves

All about Tephrite and Pyrolite Properties

Know all about Tephrite and Pyrolite properties here. All properties of rocks are important as they define the type of rock and its application. Tephrite and Pyrolite belong to Igneous Rocks.Texture of Tephrite is Aphanitic to Porphyritic whereas that of Pyrolite is Phaneritic. Tephrite appears Vesicular and Pyrolite appears Rough and Shiny. The luster of Tephrite is subvitreous to dull while that of Pyrolite is shiny. Tephrite is available in black, brown, colourless, green, grey, white colors whereas Pyrolite is available in dark greenish - grey colors. The commercial uses of Tephrite are production of lime, soil conditioner and that of Pyrolite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.

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