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Rhyolite vs Foidolite


Foidolite vs Rhyolite


Definition

Definition
Rhyolite is a fine-grained igneous rock which is rich in silica   
Foidolite is a rare type of coarse-grained intrusive igneous rock with a feldspathoid mineral content greater than 60%   

History
  
  

Origin
North America   
Unknown   

Discoverer
Ferdinand von Richthofen   
Unknown   

Etymology
From German Rhyolit, from Greek rhuax lava stream + lithos stone   
From the mineral feldspathoid which is the main content of rock   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Volcanic   
Plutonic   

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

Texture

Texture
Aphanitic, Glassy, Porphyritic   
Earthy   

Color
Grey, White, Light Black   
Black, Brown, Colourless, Green, Grey, Pink, White   

Maintenance
More   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
No   

Scratch Resistant
Yes   
No   

Stain Resistant
Yes   
No   

Wind Resistant
Yes   
No   

Acid Resistant
Yes   
No   

Appearance
Banded   
Dull   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Not Yet Used   
Curbing   

Industry
  
  

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

Medical Industry
Not Yet Used   
Taken as a Supplement for Calcium or Magnesium   

Antiquity Uses
Artifacts   
Artifacts, Monuments, Sculpture   

Other Uses
  
  

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

Types

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

Features
Acidic in nature, Available in lots of colors   
Host Rock for Lead   

Archaeological Significance
  
  

Monuments
Not Yet Used   
Used   

Famous Monuments
Not Applicable   
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
Rhyolite is a felsic extrusive rock and due to its high silica content, rhyolite lava is very viscous and is volcanic equivalent of granite.   
Foidolites 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
Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz   
Amphibole, Biotite, Feldspar, Olivine, Plagioclase, Pyroxene   

Compound Content
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide, Sodium   
Aluminium Oxide, CaO, Iron(III) Oxide, FeO   

Transformation
  
  

Metamorphism
Yes   
Yes   

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

Weathering
Yes   
No   

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering   
Not Applicable   

Erosion
Yes   
No   

Types of Erosion
Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion   
Not Applicable   

Properties

Physical Properties
  
  

Hardness
6-7   
1.5   

Grain Size
Large and Coarse Grained   
Medium to Fine Coarse Grained   

Fracture
Sub-conchoidal   
Conchoidal   

Streak
Colorless   
White   

Porosity
Highly Porous   
Very Less Porous   

Luster
Earthy   
Subvitreous to Dull   

Compressive Strength
140.00 N/mm2   
15
Not Available   

Cleavage
Not Available   
Perfect   

Toughness
2   
Not Available   

Specific Gravity
2.65-2.67   
2.86   

Transparency
Opaque   
Translucent   

Density
2.4-2.6 g/cm3   
Not Available   

Thermal Properties
  
  

Resistance
Heat Resistant, Wear Resistant   
Heat Resistant, Wear Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India   
Russia   

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

Europe
Germany, Iceland, Ireland, Italy, Spain   
Not Yet Found   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
Canada, USA   

South America
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela   
Not Yet Found   

Deposits in Oceania Continent
  
  

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

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Rhyolite vs Foidolite 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 Rhyolite and Foidolite Reserves. Rhyolite is a fine-grained igneous rock which is rich in silica. Foidolite is a rare type of coarse-grained intrusive igneous rock with a feldspathoid mineral content greater than 60%. 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 Rhyolite vs Foidolite information and Rhyolite vs Foidolite characteristics in the upcoming sections.

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Rhyolite vs Foidolite 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. Rhyolite vs Foidolite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Rhyolite and Properties of Foidolite. Learn more about Rhyolite vs Foidolite in the next section. The interior uses of Rhyolite include Decorative aggregates, Homes, Hotels, Interior decoration and Kitchens whereas the interior uses of Foidolite include Decorative aggregates and Interior decoration. Due to some exceptional properties of Rhyolite and Foidolite, they have various applications in construction industry. The uses of Rhyolite in construction industry include Arrowheads, As dimension stone, Building houses or walls, Construction aggregate, Cutting tool, For road aggregate, Knives and that of Foidolite include As dimension stone, Cement manufacture, For road aggregate.

More about Rhyolite and Foidolite

Here you can know more about Rhyolite and Foidolite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Rhyolite and Foidolite consists of mineral content and compound content. The mineral content of Rhyolite includes Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz and mineral content of Foidolite includes Amphibole, Biotite, Feldspar, Olivine, Plagioclase, Pyroxene. You can also check out the list of all Igneous Rocks. When we have to compare Rhyolite vs Foidolite, the texture, color and appearance plays an important role in determining the type of rock. Rhyolite is available in grey, white, light black colors whereas, Foidolite is available in black, brown, colourless, green, grey, pink, white colors. Appearance of Rhyolite is Banded and that of Foidolite is Dull. Properties of rock is another aspect for Rhyolite vs Foidolite. The hardness of Rhyolite is 6-7 and that of Foidolite is 1.5. The types of Rhyolite are Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks. whereas types of Foidolite are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Rhyolite is colorless while that of Foidolite is white. The specific heat capacity of Rhyolite is Not Available and that of Foidolite is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Rhyolite is heat resistant, wear resistant whereas Foidolite is heat resistant, wear resistant.

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