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Vogesite vs Variolite


Variolite vs Vogesite


Definition

Definition
Vogesite is a porphyritic alkaline igneous rock and is a variety of Lamprophyre which is dominated by essential amphibole, usually hornblende, and potassic feldspar  
Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance  

History
  
  

Origin
-  
France  

Discoverer
Unknown  
Unknown  

Etymology
From the variety of Lamprophyre Greek lampros bright and shining + porphureos purple  
From Latin varius, speckled, variegated  

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, Fine Grained Rock, Opaque Rock  
Opaque Rock  

Texture

Texture
Porphyritic  
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular  

Color
Black, Bluish - Grey, Brown, Dark Greenish - Grey, Green, Grey  
Black, Brown, Light to Dark Grey  

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
Yes  
Yes  

Stain Resistant
No  
No  

Wind Resistant
No  
No  

Acid Resistant
Yes  
Yes  

Appearance
Dull, Banded and Foilated  
Dull and Soft  

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration  
Floor Tiles, Flooring, Homes, Hotels, Kitchens  

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

Other Architectural Uses
Curbing  
Curbing  

Industry
  
  

Construction Industry
As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories  
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone  

Medical Industry
Taken as a Supplement for Calcium or Magnesium  
-  

Antiquity Uses
Artifacts, Monuments, Sculpture  
Artifacts, Monuments, Sculpture  

Other Uses
  
  

Commercial Uses
An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Production of Lime, Soil Conditioner, Source of Magnesia (MgO)  
Cemetery Markers, Creating Artwork  

Types

Types
Minette, Alnoite, Camptonite, Monchiquite, Fourchite, Vogesite, Appinite and Spessartite  
Metamorphic rock  

Features
Always found as volcanic pipes over deep continental crust, Host rock for Diamond, Is one of the oldest rock, Surfaces are often shiny  
Has High structural resistance against erosion and climate, Very fine grained rock  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Vogesite formation takes place deep beneath the Earth’s surface at around 150 to 450 kilometres, and are erupted rapidly and violently.  
Variolites are a group of dark green basic igneous rocks that exhibit pale colored spots on weathered surfaces that give them a pockmarked appearance.  

Composition
  
  

Mineral Content
Amphibole, Carbonate, Garnet, Micas, Olivine, Phlogopite, Pyroxene  
Olivine, Plagioclase, Pyroxene  

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

Transformation
  
  

Metamorphism
Yes  
Yes  

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal 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  
No  

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

Properties

Physical Properties
  
  

Hardness
5-6  
6  

Grain Size
Fine to Coarse Grained  
-  

Fracture
Conchoidal  
Conchoidal  

Streak
White  
White to Grey  

Porosity
Very Less Porous  
Less Porous  

Luster
Subvitreous to Dull  
-  

Compressive Strength
180.00 N/mm2  
18
37.50 N/mm2  
99+

Cleavage
Conchoidal  
-  

Toughness
-  
2.3  

Specific Gravity
2.86-2.87  
2.8-3  

Transparency
Translucent to Opaque  
Opaque  

Density
2.95-2.96 g/cm3  
2.9-3.1 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.84 kJ/Kg K  
15
0.84 kJ/Kg K  
15

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

Reserves

Deposits in Eastern Continents
  
  

Asia
Russia  
India, Russia  

Africa
Angola, Botswana, Cameroon, Ethiopia, South Africa  
South Africa  

Europe
England, Hungary, Iceland, United Kingdom  
Iceland  

Others
Antarctica, Greenland  
-  

Deposits in Western Continents
  
  

North America
Canada, Mexico, USA  
Canada, USA  

South America
Argentina, Colombia, Ecuador  
Brazil  

Deposits in Oceania Continent
  
  

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

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Vogesite vs Variolite 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 Vogesite and Variolite Reserves. Vogesite is a porphyritic alkaline igneous rock and is a variety of Lamprophyre which is dominated by essential amphibole, usually hornblende, and potassic feldspar. Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance. 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 Vogesite vs Variolite information and Vogesite vs Variolite characteristics in the upcoming sections.

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Vogesite vs Variolite 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. Vogesite vs Variolite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Vogesite and Properties of Variolite. Learn more about Vogesite vs Variolite in the next section. The interior uses of Vogesite include Decorative aggregates, Entryways, Flooring, Homes and Interior decoration whereas the interior uses of Variolite include Floor tiles, Flooring, Homes, Hotels and Kitchens. Due to some exceptional properties of Vogesite and Variolite, they have various applications in construction industry. The uses of Vogesite in construction industry include As dimension stone, Cement manufacture, For road aggregate, Making natural cement, Manufacture of magnesium and dolomite refractories and that of Variolite include As dimension stone, Cobblestones, Rail track ballast, Roadstone.

More about Vogesite and Variolite

Here you can know more about Vogesite and Variolite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Vogesite and Variolite consists of mineral content and compound content. The mineral content of Vogesite includes Amphibole, Carbonate, Garnet, Micas, Olivine, Phlogopite, Pyroxene and mineral content of Variolite includes Olivine, Plagioclase, Pyroxene. You can also check out the list of all Igneous Rocks. When we have to compare Vogesite vs Variolite, the texture, color and appearance plays an important role in determining the type of rock. Vogesite is available in black, bluish - grey, brown, dark greenish - grey, green, grey colors whereas, Variolite is available in black, brown, light to dark grey colors. Appearance of Vogesite is Dull, Banded and Foilated and that of Variolite is Dull and Soft. Properties of rock is another aspect for Vogesite vs Variolite. The hardness of Vogesite is 5-6 and that of Variolite is 6. The types of Vogesite are Minette, Alnoite, Camptonite, Monchiquite, Fourchite, Vogesite, Appinite and Spessartite whereas types of Variolite are Metamorphic rock. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Vogesite is white while that of Variolite is white to grey. The specific heat capacity of Vogesite is 0.84 kJ/Kg K and that of Variolite is 0.84 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Vogesite is heat resistant, impact resistant whereas Variolite is heat resistant, pressure resistant, wear resistant.

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