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Granite vs Variolite


Variolite vs Granite


Definition

Definition
Granite is a very hard, granular, crystalline igneous rock which consists mainly of quartz, mica, and feldspar and is often used as building stone   
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
Unknown   
France   

Discoverer
Unknown   
Unknown   

Etymology
From Italian granito, which means grained rock, from grano grain, and from Latin granum   
From Latin varius, speckled, variegated   

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   
Opaque Rock   

Texture

Texture
Granular, Phaneritic   
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular   

Color
Black, Grey, Orange, Pink, White   
Black, Brown, Light to Dark Grey   

Maintenance
More   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
No   

Wind Resistant
Yes   
No   

Acid Resistant
No   
Yes   

Appearance
Veined or Pebbled   
Dull and Soft   

Uses

Architecture
  
  

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

Exterior Uses
As Building Stone, As Facing Stone, Bridges, Paving Stone, Garden Decoration, Near Swimming Pools, Office Buildings, Resorts   
Garden Decoration, Office Buildings   

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone   
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Monuments, Sculpture, Small Figurines   
Artifacts, Monuments, Sculpture   

Other Uses
  
  

Commercial Uses
Curling, Gemstone, Laboratory bench tops, Tombstones, Used in aquariums   
Cemetery Markers, Creating Artwork   

Types

Types
Igneous Protolith Granite, Sedimentary Protolith Granite, Mantle Granite, Anorogenic Granite, Hybrid Granite, Granodiorite and Alkali Feldspar Granite   
Not Available   

Features
Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock   
Has High structural resistance against erosion and climate, Very fine grained rock   

Archaeological Significance
  
  

Monuments
Used   
Used   

Famous Monuments
Agia Sophia in Istanbul, Turkey, Blue Domed Church in Santorini, Greece, Blue Mosque in Istanbul, Charminar in Hyderabad, India, Diana, Princess of Wales Memorial Fountain in London, UK, Ephesus in Turkey, Georgia Guidestones in Georgia, US, Hermitage in Saint Petersburg, Khajuraho Temples, India, Mahabalipuram in Tamil Nadu, India, Mysore Palace in Karnataka, India, Signers Monument in Augusta, Georgia, Statue of Liberty in New York, USA, Taj Mahal in Agra, India, Tower Bridge in London, Vietnam Veterans Memorial in Washington, US, Washington Monument, US   
Data Not Available   

Sculpture
Used   
Used   

Famous Sculptures
Avukana Buddha Statue in Sri Lanka, Lincoln Memorial in America, Mount Rushmore National Memorial in South Dakota, US, The Colossal Red Granite Statue of Amenhotep III in Karnak, Egypt   
Data Not Available   

Pictographs
Not Used   
Used   

Petroglyphs
Not Used   
Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Granite is an intrusive igneous rock which is very hard, crystalline and is visibly homogeneous in texture and forms by melting of continental rocks   
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, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz   
Olivine, Plagioclase, Pyroxene   

Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, 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   
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism   

Weathering
Yes   
Yes   

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

Erosion
Yes   
No   

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

Properties

Physical Properties
  
  

Hardness
6-7   
6   

Grain Size
Large and Coarse Grained   
Not Applicable   

Fracture
Not Available   
Conchoidal   

Streak
White   
White to Grey   

Porosity
Less Porous   
Less Porous   

Luster
Dull to Grainy with Sporadic parts Pearly and Vitreous   
Not Available   

Compressive Strength
175.00 N/mm2   
13
37.50 N/mm2   
27

Cleavage
Not Available   
Not Available   

Toughness
Not Available   
2.3   

Specific Gravity
2.6-2.7   
2.8-3   

Transparency
Opaque   
Opaque   

Density
2.65-2.75 g/cm3   
2.9-3.1 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.79 kJ/Kg K   
16
0.84 kJ/Kg K   
15

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

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam   
India, Russia   

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

Europe
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic, Venezuela   
Iceland   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
Canada, USA   

South America
Not Yet Found   
Brazil   

Deposits in Oceania Continent
  
  

Australia
Not Yet Found   
Not Yet Found   

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Granite 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 Granite and Variolite Reserves. Granite is a very hard, granular, crystalline igneous rock which consists mainly of quartz, mica, and feldspar and is often used as building stone. 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 Granite vs Variolite information and Granite vs Variolite characteristics in the upcoming sections.

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Granite 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. Granite vs Variolite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Granite and Properties of Variolite. Learn more about Granite vs Variolite in the next section. The interior uses of Granite include Countertops, Decorative aggregates, Entryways, Floor tiles, Flooring, Homes, Hotels, Interior decoration, Kitchens and Stair treads whereas the interior uses of Variolite include Floor tiles, Flooring, Homes, Hotels and Kitchens. Due to some exceptional properties of Granite and Variolite, they have various applications in construction industry. The uses of Granite in construction industry include As dimension stone and that of Variolite include As dimension stone, Cobblestones, Rail track ballast, Roadstone.

More about Granite and Variolite

Here you can know more about Granite and Variolite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Granite and Variolite consists of mineral content and compound content. The mineral content of Granite includes Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz 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 Granite vs Variolite, the texture, color and appearance plays an important role in determining the type of rock. Granite is available in black, grey, orange, pink, white colors whereas, Variolite is available in black, brown, light to dark grey colors. Appearance of Granite is Veined or Pebbled and that of Variolite is Dull and Soft. Properties of rock is another aspect for Granite vs Variolite. The hardness of Granite is 6-7 and that of Variolite is 6. The types of Granite are Igneous Protolith Granite, Sedimentary Protolith Granite, Mantle Granite, Anorogenic Granite, Hybrid Granite, Granodiorite and Alkali Feldspar Granite whereas types of Variolite are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Granite is white while that of Variolite is white to grey. The specific heat capacity of Granite is 0.79 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.Granite is heat resistant, wear resistant whereas Variolite is heat resistant, pressure resistant, wear resistant.

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