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Teschenite and Rhyolite


Rhyolite and Teschenite


Definition

Definition
Teschenite is coarse- to fine-grained, dark-coloured intrusive igneous rock that usually occurs in sills, dikes and irregular masses and is always altered to some extent   
Rhyolite is a fine-grained igneous rock which is rich in silica   

History
  
  

Origin
Scotland   
North America   

Discoverer
Unknown   
Ferdinand von Richthofen   

Etymology
From its occurrence near Teschen. now known as Cieszyn, Pol., Scotland   
From German Rhyolit, from Greek rhuax lava stream + lithos stone   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Plutonic   
Volcanic   

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

Texture

Texture
Phaneritic   
Aphanitic, Glassy, Porphyritic   

Color
Dark Grey to Black   
Grey, White, Light Black   

Maintenance
Less   
More   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
Yes   

Wind Resistant
Yes   
Yes   

Acid Resistant
Yes   
Yes   

Appearance
Veined and Shiny   
Banded   

Uses

Architecture
  
  

Interior Uses
Countertops, Decorative Aggregates, Entryways, Homes, Interior Decoration   
Decorative Aggregates, Homes, Hotels, Interior Decoration, Kitchens   

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

Other Architectural Uses
Curbing   
Not Yet Used   

Industry
  
  

Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate   
Arrowheads, As Dimension Stone, Building houses or walls, Construction Aggregate, Cutting Tool, for Road Aggregate, Knives   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Sculpture   
Artifacts   

Other Uses
  
  

Commercial Uses
Cemetery Markers, Commemorative Tablets, Creating Artwork, Laboratory bench tops, Jewelry, Sea Defence, Tombstones   
Gemstone, Laboratory bench tops, Jewelry   

Types

Types
Not Available   
Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.   

Features
Smooth to touch   
Acidic in nature, Available in lots of colors   

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
Not Used   
Not Used   

Petroglyphs
Not Used   
Not Used   

Figurines
Used   
Not Yet Used   

Fossils
Absent   
Absent   

Formation

Formation
Teschenite 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.   
Rhyolite is a felsic extrusive rock and due to its high silica content, rhyolite lava is very viscous and is volcanic equivalent of granite.   

Composition
  
  

Mineral Content
Augite, Olivine, Plagioclase, Pyroxene   
Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz   

Compound Content
Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide   
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide, Sodium   

Transformation
  
  

Metamorphism
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
7   
6-7   

Grain Size
Coarse Grained   
Large and Coarse Grained   

Fracture
Conchoidal   
Sub-conchoidal   

Streak
Black   
Colorless   

Porosity
Highly Porous   
Highly Porous   

Luster
Not Available   
Earthy   

Compressive Strength
225.00 N/mm2   
7
140.00 N/mm2   
15

Cleavage
Not Available   
Not Available   

Toughness
1.6   
2   

Specific Gravity
2.86-2.87   
2.65-2.67   

Transparency
Opaque   
Opaque   

Density
2.7-3.3 g/cm3   
2.4-2.6 g/cm3   

Thermal Properties
  
  

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

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Russia   
China, India   

Africa
South Africa   
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa   

Europe
Germany, Greece, Italy, Scotland, Turkey   
Germany, Iceland, Ireland, Italy, Spain   

Others
Greenland   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
Canada, USA   

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

Deposits in Oceania Continent
  
  

Australia
New Zealand, Queensland   
New Zealand, Queensland, Western Australia   

Summary >>
<< Reserves

All about Teschenite and Rhyolite Properties

Know all about Teschenite and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Teschenite and Rhyolite belong to Igneous Rocks.Texture of Teschenite is Phaneritic whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Teschenite appears Veined and Shiny and Rhyolite appears Banded. The luster of Teschenite is not available while that of Rhyolite is earthy. Teschenite is available in dark grey to black colors whereas Rhyolite is available in grey, white, light black colors. The commercial uses of Teschenite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones and that of Rhyolite are gemstone, laboratory bench tops, jewelry.

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